NSO LEVEL-1 Booklet For Class-VIII

Class 815th Set A Year 2012 15th NSO - SET A 1 2 MENTAL ABILITY ( x − 1) 1. If x = 5 + 2 6, then is equal to _____. x (A) 2 (B) 2 2 (C) 3 (D) 2 3 2. If a company sells a car with a marked price of ` 2,72,000 and gives a discount of 4% on ` 2,00,000 and 2.5% on the remaining amount then the actual price charged by the company for the car is ___. (A) ` 2,50,000 (B) ` 2,55,000 (C) ` 2,60,100 (D) ` 2,62,200 3. The characters in given matrix follow a certain trend, row-wise or column-wise. 31 17 58 87 Find out this trend and choose the missing character from the given 68 19 61 56 options. 91 22 70 50 (A) 3 (B) 6 (C) 7 (D) 9 10 142 11 ? 4. The difference between simple interest and compound interest on a certain sum of money for 2 years at 4% per annum is ` 20. Then the sum is ____. (A) ` 13,500 (B) ` 12,500 (C) ` 11,500 (D) ` 15,200 5. The squares which should be shaded to make the adjoining figure symmetric is ____. (A) P and Q (B) P and S (C) Q and R (D) R and S 6. Which of the following statements is correct? (A) All rectangles are squares. (B) All kites are rhombuses. (C) All rhombuses are parallelograms. (D) All trapeziums are squares. 7. The number of two digit numbers which are both perfect squares and perfect cubes is______ . (A) 0 (B) 2 (C) 1 (D) 3 8. In the given matrix, find out which of the options completes the figure matrix? (A) (B) (C) (D) 9. The area of the adjoining polygon (not drawn to scale) is ____. (A) 109 cm2 (B) 280 cm2 (C) 322 cm2 (D) 900 cm2 10. The sum of the digits of a 2-digit number is 12. If the new number formed by reversing the digits is greater than the original number by 54, then the original number is ____. (A) 39 (B) 93 (C) 49 (D) 23 11. In a certain code language, 'put tir fin' means 'delicious juicy fruit', 'tie dip sig' means 'beautiful white lily' and 'sig lon fin' means 'lily and fruit'. Which of the following stands for 'and' in that language? (A) lon (B) sig (C) fin (D) None of these 15th NSO - SET A 2 3 12. The given pie-chart shows the percentage of Literate and Illiterate– Males and Females in a city. The difference between the number of Literate Males and Literate Females is _____. (A) 75,000 (B) 1,500 (C) 5,000 (D) 500 13. Simplify the following expression : −51x 5 y 12 − 34 x 12 y 5  120 x 7 y 8 54 x 2 y 4  × ÷ −17 x 5 y 5  40 x 4 y 3 9 xy   3y 6 + 2x 6  2 2  3y 7 + 2x 7  2 2 7 7 2 2 (D) − (3 y + 2 x )( x y ) 6 6 2 2 (A) −   ( x y ) (B)   (x y ) (C) (3 y + 2 x )( x y )  3   2  3 2 14. In the set of problem figures, there is a definite relationship between figures P and Q. Establish a similar relationship between figures R and S by selecting a suitable figure from the options that would replace the question mark (?) in the Problem Figures. Problem Figures ? P Q R S (A) (B) (C) (D) 15. A cistern from inside is 12.5 m long, 8.5 m broad and 4 m high and is open at top. The cost of cementing the inside of a cistern at ` 24 per sq m is ______. (A) ` 6582 (B) ` 8256 (C) ` 7752 (D) ` 8752 SCIENCE 16. A thin tube contains a thread of mercury which traps air at the end of the tube. The other end of the tube is open to the atmosphere. When the tube is turned upside down, the volume of the trapped air increases. It is because ______. (A) The air gets hotter when the tube is turned upside down (B) The atmosphere pushes less when it acts upwards on the mercury (C) The pressure in the trapped air is reduced (D) The trapped air molecules hit the mercury harder when travelling downwards 17. Which of the following does not produce a sound wave? (A) A silencer fixed gun fired (B) A bell ringing under water (C) A hammer hitting a block of rubber (D) An explosion on the moon 18. A candle is placed before a thick plane mirror. When looked obliquely in the mirror a number of images are seen from the surface of the plane mirror. Which of the following statements is correct? (A) First image is brightest (B) Second image is brightest (C) Third image is brightest (D) All images are equally bright 15th NSO - SET A 3 4 19. On holding a stainless steel spoon near our face, we see (A) Our inverted image on outer side of the spoon (B) Our erect image on inner side of the spoon (C) Our inverted image on inner side of the spoon (D) Our laterally inverted image on inner side of the spoon 20. During a thunderstorm, an observer can see lightning before hearing its thunder. Why does he see lightning before he hear thunder ? (A) Sound travels slower than light. (B) Sound needs a medium to travel through. (C) Sound cannot reflect off surfaces as easily as light. (D) Sound is not processed by the brain as fast as light. 21. The given graph illustrates the motion of an object. Which feature of the graph represent the distance travelled by the object moving at a constant speed? (A) Area S (B) Area S + area T (C) Area T (D) The gradient at point X 22. Sonic vibrations were sent down from a ship return after 2 seconds. What is the depth of the sea, if the speed of sound in water is 1.5 km s–1 ? (A) 150 m (B) 3 km (C) 1.5 km (D) 750 m 23. Which of the following planets can be seen with naked eye ? (A) Mercury, Venus, Mars, Jupiter (B) Mars, Jupiter, Uranus, Neptune (C) Mercury, Venus, Uranus, Neptune (D) Mercury, Mars, Jupiter, Neptune 24. A cook makes a pudding as shown. The pudding is placed in a very hot oven until the top of the egg whites turns brown. It is then removed from the oven. Why does the ice cream stay cold? (A) Air is a good conductor of heat and conducts the heat away from the ice cream. (B) Air is a poor conductor of heat and stops the heat from reaching the ice cream. (C) The metal dish is a good conductor of heat and conducts the heat away from the ice cream. (D) The metal dish is a poor conductor of heat and stops the heat from reaching the ice cream. 25. Read the given statements and mark the correct option. Statement 1 : When a bicycle is in motion, the force of friction exerted by the ground on the two wheels is always in forward direction. Statement 2 : The frictional force acts only when the bodies are in contact. (A) Both statements 1 and 2 are true and statement 2 is the correct explanation of statement 1. (B) Both statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1. (C) Statement 1 is true but statement 2 is false. (D) Statement 1 is false and statement 2 is true. 26. A copper disc has a circular hole drilled in it so that it can act as a washer for a nut and bolt. If this washer is heated equally all over, which of the given options will be true? Circumference of inner hole Circumference of washer (A) Remains constant Increases (B) Decreases Increases (C) Increases Decreases (D) Increases Increases 15th NSO - SET A 4 5 27. Which of the following cannot be charged easily by friction? (A) A plastic scale (B) A woollen cloth (C) An inflated balloon (D) A copper rod 28. Three students stand 2 m apart in front of a plane mirror that is 3 m long. Student Y is standing at the mid-point of the mirror. How many student(s) can see the images of the other two? (A) 0 (B) 1 (C) 2 (D) 3 29. A car driver took a total of two hours to make a journey of 75 km. He had a coffee break of half an hour and spent a quarter of an hour stationary in a traffic jam. What was his average speed during the journey? (A) 38 km h–1 (B) 50 km h–1 (C) 60 km h–1 (D) 75 km h–1 30. Taking one light year equal to 9.4 × 10 15 m and one day equal to 86400 s, what will be the speed of light in light year per day if the speed of light in m s –1 is 3 × 108 ? (A) 2.75 × 10–3 ly day–1 (B) 3.75 × 10–3 ly day–1 (C) 2.75 × 103 ly day–1 (D) 3.79 × 103 ly day–1 31. Sudha took a small amount of sulphur in deflagrating spoon and heated it over a burner. As soon as it started burning she put it in a gas jar and covered with a lid. After sulphur stopped burning she added a small amount of water in it and dissolved the gas in water by shaking it. She then tested the solution with red and blue litmus paper. What did she observe? (A) In the solution the blue litmus paper turned red. (B) In the solution the red litmus paper turned blue. (C) There was no change in the colour of litmus paper. (D) Blue litmus paper turned red and red litmus paper turned blue. 32. The given diagrams show the reactions of three metals with dilute hydrochloric acid. What are metals P, Q and R? Bubbles of P Q R hydrogen (A) Copper Magnesium Zinc (B) Copper Zinc Magnesium Dilute Dilute Dilute hydrochloric hydrochloric hydrochloric (C) Magnesium Zinc Copper acid acid acid Metal P Metal Q Metal R (D) Zinc Magnesium Copper 33. Ramesh mixed some iron filings with sulphur powder in a China dish. In another dish he mixed iron filings and sulphur powder and heated the mixture. Which of his observations is not correct? (A) Dish X shows a physical change while dish Y shows a chemical change. (B) In dish X sulphur powder and iron filings can be seen separately. (C) In dish Y a new substance is formed on heating the mixture. (D) The change which has taken place in dish Y is reversible. 34. Given below are few statements. I. When rubbed on fingers, bases give a soapy feeling. II. The salt produced in neutralisation reaction may be acidic, basic or neutral. III. Antacids are acids used to treat acidity and indigestion. Select the correct option. (A) Only I is correct. (B) Only I and II are correct. (C) Only I and III are correct. (D) All I, II and III are correct. 15th NSO - SET A 5 6 35. Few characteristics of three fuels X, Y and Z are given below. X Y Z Not easily stored or Can be stored in tanks and Can be stored in tanks and transported transported through pipes transported through pipes Extremely polluting Produce almost no pollutants Moderately polluting Identify X, Y and Z respectively. (A) LPG, Biogas, Coal (B) Coal, Natural gas, Petroleum (C) Petroleum, LPG, Coal (D) Natural gas, Cow dung cake, LPG 36. Three experiments to investigate the reactivities of three metals are shown. Chromium Manganese Chromium Aqueous Aqueous Aqueous nickel sulphate nickel sulphate manganese sulphate Result : Nickel displaced Nickel displaced Manganese not displaced What is the correct order of reactivity (most reactive → least reactive) for these three metals? (A) Chromium, Manganese, Nickel (B) Manganese, Chromium, Nickel (C) Manganese, Nickel, Chromium (D) Nickel, Chromium, Manganese 37. Four experiments on rusting are shown below. Which two experiments can be used to show that air is needed for iron to rust? (A) 1 and 3 (B) 1 and 4 (C) 2 and 3 (D) 2 and 4 38. If Raman opened the air-hole of a bunsen burner fully and lighted the burner, he will get ______. (A) A luminous flame which is orange-yellow in colour. (B) A non-luminous flame which is pale blue in colour. (C) A flame that strikes back which is thin blue or green-yellow in colour. (D) A smoky flame which gives off a lot of soot. 39. Select the correct option which on rearranging gives the term for the ground-water stored between layers of hard rock below the water table. (A) Duclos (B) Refquai (C) Ragclei (D) Pwmas 40. Observe the given apparatus carefully showing an activity performed to compare the carbon dioxide content of inhaled and exhaled air. What would be the observation for T 1 and T2 test tubes and its correct explanation? [(+) indicates milky colouration in limewater] T 1 T2 Explanation (A) +++ ++ CO2 content is a little higher in inhaled air (B) ++++ + CO2 content is considerably higher in inhaled air (C) + ++++ CO2 content is considerably higher in exhaled air (D) ++ ++ CO2 content is same in both inhaled and exhaled air 15th NSO - SET A 6 7 41. A schematic representation of the blood circulation is given. Which circulatory parts are incorrectly placed in it? (A) Right atrium and right ventricle (B) Left atrium and left ventricle (C) Pulmonary artery and pulmonary veins (D) Aorta and vena cava 42. The given figure shows different layers of a forest labelled as W, X, Y and Z. Which layer is the habitat of many animal species like monkeys, orangutans, toucans and sloths as there is plenty of food available? (A) W (B) X (C) Y (D) Z 43. Namita’s mother does not allow her to lie on the abdomen immediately after having food. What could most likely be the reason for this? (A) In stomach, food gets processed into a thick liquid called chyme. (B) Peristaltic movement gets affected throughout the digestive tract especially small intestine where digestion and absorption chiefly occurs, hence food does not properly mix with enzymes and stays undigested. (C) The small intestine, on compression, releases intestinal juices which restrict the action of digestive enzymes in the small intestine. (D) The peristaltic movement gets affected throughout the digestive tract especially large intestine where poor motility may result in greater absorption of water and thereby may cause diarrhoea. 44. Match Column-I with Column-II and select the correct option from the codes given below. Column-I Column-II (a) Scouring (i) Wool fibres are passed through rollers to straighten the fibres. (b) Shearing (ii) Unwinding silk fibres from a cocoon. (c) Reeling (iii) The fleece of the sheep alongwith a thin layer of skin is removed. (d) Carding (iv) Stained, damaged or inferior wool is removed. (v) Sheared hair are washed thoroughly to remove the impurities. (A) (a) - (iv), (b) - (iii), (c) - (v), (d) - (i) (B) (a) - (v), (b) - (iii), (c) - (ii), (d) - (i) (C) (a) - (v), (b) - (iii), (c) - (iv), (d) - (i) (D) (a) - (iii), (b) - (ii), (c) - (v), (d) - (iv) 45. The given figure shows an irrigation method used in agricultural practice. Which of the following is correct regarding this irrigation method ? (A) It is the best technique for watering fruit plants, gardens and trees. (B) It is a boon in regions where availability of water is poor. (C) The method provides water to the plants drop by drop at their roots. (D) All of these. 46. Latika observed her grandmother adding lots of salt on unripe mangoes to prepare pickles. Her grandmother also added excess of oil in the pickle jar. What could be the reason for it? (A) Salt prevents growth of microorganisms by retaining moisture in the food item and oil provides an environment in which microorganisms cannot grow. (B) Salt prevents growth of microorganisms by forcing them to lose water by osmosis and oil provides an environment in which microorganisms cannot grow. (C) Salt prevents growth of microorganisms by retaining moisture in the food item and oil prevents their growth by forcing out water from them by osmosis. (D) Salt prevents growth of microorganisms by forcing them to lose water by osmosis and oil prevents their growth by retaining moisture in the food item. 15th NSO - SET A 7 8 47. Look at the given cell carefully. Identify the function of the part labelled ‘Y’. (A) It controls the movement of materials in and out of the cell. (B) It controls all the activities of the cell. (C) It contains many cell parts. (D) It provides protection to the cell. 48. Match Column-I with Column-II and select the correct option from the codes given below. Column-I Column-II (a) Jim Corbett National Park (i) Karnataka (b) Kanha National Park (ii) Madhya Pradesh (c) Kaziranga Wildlife Sanctuary (iii) Tamil Nadu (d) Bandipur Sanctuary (iv) Uttaranchal (e) Mudumalai Sanctuary (v) Assam (A) (a)- (i), (b)- (iii), (c)- (iv), (d)- (ii), (e)- (v) (B) (a)- (v), (b)- (iv), (c)- (ii), (d)- (i), (e)- (iii) (C) (a)- (iv), (b)- (v), (c)- (i), (d)- (iii), (e)- (ii) (D) (a)- (iv), (b)- (ii), (c)- (v), (d)- (i), (e)- (iii) 49. Read the given statements and select the correct option. Statement 1 : Aquatic animals produce large number of eggs and sperms necessary to ensure external fertilization. Statement 2 : The eggs swim in water with the help of cilia, and fertilize the sperms. (A) Both statements 1 and 2 are true and statement 2 is the correct explanation of statement 1. (B) Both statements1 and 2 are true but statement 2 is not the correct explanation of statement 1. (C) Statement 1 is true but statement 2 is false. (D) Both statements 1 and 2 are false. 50. Which of these is a behavioral adaptation? (A) A hognose snake pretends as dead to trick the predator. (B) A frog’s light-coloured belly makes it harder for a predatory fish to see it against sunlight on the water surface. (C) The scarlet king snake looks very much like the poisonous coral snake. (D) A treehopper on a leaf or twig resembles a thorn. SPACE FOR ROUGH WORK Class 8 15th Set B Year 2012 15th NSO - SET B 1 Mental ability 1. Five cities A, B, C, D and E are famous for their lovely gardens, fancy jewellery, educational institutes, blue pottery and scents but not in the same order and one city is famous for only one feature. (i) A and C are neither educational centres nor have gardens. (ii) B and E are not famous for jewellery or pottery. (iii) Scents and jewellery have nothing to do with A. (iv) D and E are not famous for gardens and jewellery. (v) D is not famous for educational institutes. City E is famous for which of the following features? (A) Jewellery (B) Educational institutes (C) Scents (D) Gardens 1 2. A train at a uniform speed covers a distance of 350 km in 3 hours. Find the distance the train 2 covered in 5 hours. (A) 100 km (B) 500 km (C) 400 km (D) 680 km 3 3. The value of 0.008 + 0.64 + 4 6.5536 + 0.0009 is ______. (A) 2.03 (B) 2.63 (C) 2.36 (D) 2.13 4. It is estimated that by 2070 the population of the world will be 1.03 × 10 10. If 1.03 × 1010 = k billion. Find the value of k. (A) 1.03 (B) 10.3 (C) 103.0 (D) 1030.0 5. A die is thrown. Find the probability of getting a prime number. 1 2 1 1 (A) (B) (C) (D) 2 3 3 4 6. If in the word 'ELECTROCARDIOGRAPH' the first half of the letters are reversed, second letter from left end is then prefixed and finally 'S' is suffixed, then the letter exactly in the middle is ____. (A) L (B) R (C) D (D) E 7. Which of the following statements is incorrect about a KITE? (A) It is a quadrilateral with exactly two pairs of equal consecutive sides. (B) The diagonals are perpendicular to one another. (C) One of the diagonals trisects the other. (D) None of these 8. A clock seen through a mirror shows quarter to three. The correct time shown by the clock is ______. (A) 8 : 15 (B) 9 : 12 (C) 8 : 17 (D) 9 : 15 9. If a man left one-third of his money to his daughter, one-fourth to his son and the remaining ` 20,000 to his wife, then the money man has left is ______. (A) ` 36,000 (B) ` 48,000 (C) ` 28,000 (D) ` 54,000 10. A trader sells two articles, one at a loss of 10% and another at a profit of 15% but finally there is no loss or gain. If the total sale price of these two articles is ` 30,000, then the difference between their cost prices is ____. (A) ` 5000 (B) ` 6000 (C) ` 7500 (D) None of these 15th NSO - SET B 2 11. Which of the following pairs is not correctly matched? Geometrical objects Number of vertices (A) Triangular prism 4 (B) Pyramid with rectangular base 5 (C) Cube 6 (D) Triangle 3 12. Select a figure which will continue the same series as established by the given five Problem Figures. (A) (B) (C) (D) 13. If the given pie chart shows the spendings of a country on various sports during a particular year, then the per cent of the total spendings spent on tennis is _____. 1 (A) 12 % 2 1 (B) 22 % 2 (C) 25% (D) 45% 14. Abhinav purchased a tracksuit for ` 2400 cash or for ` 1000 cash down payments and two monthly installments of ` 800 each. The rate of interest is ______. (A) 75% (B) 120% (C) 50% (D) None of these 15. Three cubes each of edge 3 cm long are placed together as shown in the figure. The surface area of the cuboid so formed is _____. (A) 182 sq. cm (B) 162 sq. cm 3 cm m 3c (C) 126 sq. cm (D) None of these 3 cm 3 cm 3 cm science 16. Read the given statements and select the correct option. Statement 1 : The velocity of sound decreases with increase in humidity. Statement 2 : The velocity of sound depends upon the density of medium. (A) Both statements 1 and 2 are true and statement 2 is the correct explanation of statement 1. (B) Both statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1. (C) Statement 1 is true but statement 2 is false. (D) Statement 1 is false but statement 2 is true. 17. The given graph shows the position of a particle moving along the x-axis as a function of time. Select the correct statement about the graph. (A) The particle has come to rest 6 times during its motion. (B) The maximum speed is at t = 6 s. (C) The velocity remains positive for t = 0 to t = 6 s. (D) The average velocity for the total period shown is negative. 15th NSO - SET B 3 18. Match Column-I with Column-II and select the correct option from the codes given below. Column-I Column-II (a) A child running to catch the school bus (i) Force can make a stationary object to move (b) A man blowing a balloon (ii) Force can stop a moving object (c) A woman pushing a table (iii) Force can change the shape of an object (d) A cricketer catching a ball (iv) Force can make an object move faster (A) (a)-(iv), (b)-(iii), (c)-(i), (d)-(ii) (B) (a)-(iii), (b)-(ii), (c)-(i), (d)-(iv) (C) (a)-(i), (b)-(ii), (c)-(iii), (d)-(iv) (D) (a)-(ii), (b)-(iv), (c)-(i), (d)-(iii) 19. The diagram shows a mercury barometer. What happens to the column height h when the mercury barometer is taken up in a balloon? (A) It decreases, because atmospheric pressure increases with height. h (B) It decreases, because atmospheric pressure decreases with height. (C) It increases, because atmospheric pressure increases with height. (D) It increases, because atmospheric pressure decreases with height. 20. The light reflected by a plane mirror may form a real image ________. (A) If the rays incident on the mirror are converging (B) If the object is placed very close to the mirror (C) If the rays incident on the mirror are diverging (D) Under no circumstances 21. The graph shows the temperature changes when wax cools from Temperature (°C) P liquid to solid. At which labelled point would the wax be a mixture Q R S of solid and liquid? T (A) P (B) Q Time (s) (C) R (D) S 22. Consider a vehicle moving on a horizontal road towards east. Neglect any force by the air, the frictional forces on the vehicle by the road _________. (A) Is towards east if the vehicle is accelerating (B) Must be towards east (C) Must be towards west (D) None of these 23. Two plane mirrors are placed parallel to each other as shown in the figure. There is an object placed at O between the mirrors at 5 cm from the mirror M2. What is the distance of third image from the mirror M2? (A) 5 cm (B) 15 cm (C) 25 cm (D) 35 cm 24. A wooden block floats in a beaker of water. The block is near the wall of the beaker as shown in the figure. If P1, P2 and P3 be the pressure at the three points A, B and C respectively at the bottom of the container, then (A) P1 = P2 > P3 (B) P1 = P2 < P3 (C) P1 > P2 > P3 (D) P2 = P3 > P1 25. During the electrolysis of dilute sulphuric acid, it splits into ________. (A) Oxygen ions and hydrogen ions (B) Oxygen ions, hydrogen ions and sulphate ions (C) Oxygen ions and sulphate ions (D) Hydrogen ions and sulphate ions 26. In an experiment to measure the speed of sound in air, a boy stands 40 m from a wall and bangs two pieces of wood together. At the instant he hears the echo, he bangs them together again. He does this activity 50 times. The time taken for 50 bangs is 12 s. Which calculation gives the speed of sound in air? 40 × 50 40 × 2 × 12 (C) 40 × 2 × 50 12 (A) (B) (D) 40 × 50 12 12 50 15th NSO - SET B 4 27. A boy is moving along a circular track. He covers one complete round of 30 m in 30 s. The average speed and average velocity of the boy in m s–1 is respectively ______. (A) 1, 0 (B) 0, 1 (C) 1, 1 (D) 0, 0 28. Match Column-I with Column-II and select the correct option from codes given below. Column-I Column-II (a) Insulator (i) Prevents rusting (b) Conductor (ii) Pure water (c) Electroplating (iii) Copper wire (A) (a)-(i), (b)-(ii), (c)-(iii) (B) (a)-(iii), (b)-(i), (c)-(ii) (C) (a)-(i), (b)-(iii), (c)-(ii) (D) (a)-(ii), (b)-(iii), (c)-(i) 29. Comets spend most of their time _________. (A) Far away from the sun (B) Close to one planet or the other (C) Very close to sun (D) Very close to earth 30. The length of the shadow will be longest when the _________. (A) Angle between the source of light and the object is 45° (B) Source of light and the object are parallel to each other (C) Source of light and the object are perpendicular to each other (D) Angle between the source of light and the object is 60° 31. A piece of calcium metal is placed in water. A reaction takes place in which bubbles of hydrogen gas are seen. After the reaction stops, the solution is tested for its colour, temperature and action with litmus solution. Select the correct observation. (A) The solution is hot, milky white and turns red litmus blue. (B) The solution is hot, colourless and turns blue litmus red. (C) The solution is cold, milky and turns blue litmus red. (D) The solution is cold, colourless and does not change the colour of litmus. 32. A student investigated the reactivity of four metals – iron, copper, zinc and an unknown metal X. He arranged three experimental set up as shown in the diagram. Iron Zinc Metal X Solution containing Solution containing Solution containing aqueous copper (II) aqueous iron (II) aqueous zinc (II) ions ions ions Experiment 1 Experiment 2 Experiment 3 The student observes that reaction occurred in all the three experiments. Identify the metal X. (A) Cu (B) Mg (C) Fe (D) Au 33. Four test-tubes were set up as shown in the following options. Each piece of iron was protected on one side by coating of different materials. In which test-tube is the iron least likely to rust? Water Water Water (A) (B) (C) (D) Iron Iron Iron Grease Paint Plastic 15th NSO - SET B 5 34. Match Column-I with Column-II and select the correct option from the codes given below. Column-I Column-II (i) Production of biogas from animal waste (p) Stainless steel (ii) Dissolving sugar in water to make solution (q) Physical change (iii) Depositing a layer of zinc on iron (r) Chemical change (iv) Mixing of iron with carbon and metals (s) Galvanisation like chromium or nickel (A) (i)-p, (ii)-q, (iii)-r, (iv)-s (B) (i)-r, (ii)-q, (iii)-s, (iv)-p (C) (i)-q, (ii)-r, (iii)-s, (iv)-p (D) (i)-s, (ii)-r, (iii)-p, (iv)-q 35. Which of the following statements are true? I. Yellow flames are ideal for heating. II. The substances which vapourise during burning, give flames. III. Luminous zone contains unburnt carbon particles. IV. The non-luminous zone has highest temperature. (A) I, II and III (B) I, II and IV (C) II, III and IV (D) I, III and IV 36. Observe the chemical reactions taking place in two test tubes X and Y. Which two gases are evolved in test tubes X and Y respectively? (A) Carbon dioxide and hydrogen (B) Hydrogen and carbon dioxide (C) Oxygen and carbon dioxide (D) Carbon dioxide and oxygen 37. Which of the following is an incorrect match? (A) An oily liquid formed when coal is heated in absence of air - Coal tar (B) A gas found along with petroleum in reservoirs under the ground - Natural gas (C) A thick black liquid found trapped in underground rocks - Petroleum (D) A residue left behind when destructive distillation of coal is carried out - Charcoal 38. Match Column-I with Column-II and select the correct option from the codes given below. Column-I Column-II (i) A synthetic fibre obtained from cellulose (p) Acrylic (ii) A synthetic fibre used for making woollen clothes (q) Nylon (iii) A thermosetting plastic (r) Rayon (iv) This polymer is used for making ropes and fishing nets (s) Bakelite (A) (i)-(p); (ii)-(q); (iii)-(r); (iv)-(s) (B) (i)-(r); (ii)-(p); (iii)-(s); (iv)-(q) (C) (i)-(s); (ii)-(r); (iii)-(q); (iv)-(p) (D) (i)-(p); (ii)-(r); (iii)-(q); (iv)-(s) 39. Which of the following is correct regarding the given Venn diagram? (A) X is Venus fly trap, Y is mistletoe (B) X is Cuscuta, Y is Monotropa (C) X is mistletoe, Y is Cuscuta (D) X is mistletoe, Y is mushroom 40. Sakshi wants to test the quality of her dupatta. She pulled a small strand of yarn from the dupatta and burned it. It smelled like a burning plastic. She inferred that the dupatta is made of ______. (A) Pure wool (B) Nylon (C) Pure silk (D) Cotton 15th NSO - SET B 6 41. Read the given statements. (i) Ingestion in Hydra occurs with the help of pseudopodia. (ii) Bile juice is secreted by gall bladder and stored in liver. (iii) In humans, digestion of starch starts in the mouth. (iv) The outer covering of teeth is called enamel and is the hardest substance in human body. (v) Omasum is the largest chamber of ruminant stomach where food is stored. Which of the above statements are incorrect ? (A) (i), (ii) and (v) (B) (iii) and (iv) (C) (ii), (iii) and (iv) (D) (i), (ii) and (iii) 42. Identify P, Q, R, S and T in the given flowchart and select the correct option. Vegetative propagation in plants P Q R S T (A) Bulb Tuber Rhizome Bryophyllum Spirogyra P Q R Fragmentation Leaf (B) Stolon Layering Bulb Colocasia Lily buds (C) Tuber Rhizome Layering Marigold Rose Ginger Onion Potato S T (D) Rhizome Bulb Tuber Spirogyra Bryophyllum 43. Match Column-I with Column-II and select the correct option from the codes given below. Column-I Column-II (a) Phloem (i) Contain respiratory pigment (b) Arteries (ii) Translocation of food in plants (c) Red blood cells (iii) Carry oxygenated blood away from the heart (d) Xylem (iv) Have thin walls (e) Veins (v) Conducts water from roots to leaves (A) a-(v), b-(iv), c-(iii), d- (ii), e-(i) (B) a-(ii), b-(iii), c-(i), d-(v), e-(iv) (C) a-(iii), b-(i), c-(ii), d-(iv), e-(v) (D) a-(iv), b-(v), c-(ii), d-(iii), e-(i) 44. The given diagram shows respiratory system of man. Which of the following correctly shows the functions of the parts labelled W, X, Y and Z? (A) W - Facilitates movement of air by expansion (B) W - Helps in gaseous and contraction exchange X - Traps dust and helps to filter inhaled air X - Traps dust and helps to filter inhaled air Y - Prevents the wind pipe from collapsing Y - Serves as a common passage for air and food Z - Help in exchange of gases Z - Protect the lungs from damage (C) W - Prevents the wind pipe from (D) W - Facilitates movement of air by collapsing expansion and contraction X - Serves as a common passage for air and food X - Helps in gaseous exchange Y - Helps in upward and downward movement of ribcage Y - Serves as a common passage for food and air Z - Trap dust and help to filter inhaled air Z - Protect the lungs from damage 45. Which of the following on reshuffling gives the term that refers to the process of sowing seeds manually by sprinkling them on soil by hand ? (A) inigtil (B) glnopuihg (C) atnbrdocaigs (D) giownwin 46. The change in number of two species X and Y belonging to the same food chain over a period of time is shown in the given graph. Which of the following best identifies the organisms? X Y (A) Chicken Corn (B) Fox Hen (C) Grass Rabbit (D) Lion Deer 15th NSO - SET B 7 47. Correct the given statements by replacing the underlined words and select the correct option. (i) The viscous fluid present in the nucleus is called cytoplasm. (ii) Vacuoles are rod shaped structures which oxidize food to provide energy. (iii) Mitochondria contain green pigment chlorophyll and take part in photosynthesis. (iv) Lysosomes take part in synthesis of protein. (i) (ii) (iii) (iv) (A) Nucleoplasm Lysosomes Plastids Centrosome (B) Protoplasm Ribosomes Centrosome Golgi bodies (C) Nucleoplasm Mitochondria Chloroplasts Ribosomes (D) Protoplasm Plastids Endoplasmic reticulum Ribosomes 48. Identify X, Y and Z in the given flowchart and select the correct option. X Y Z (A) Pituitary gland TSH Thyroid gland (B) Adrenal gland Adrenaline Hypothalamus (C) Hypothalamus Pituitary gland Parathyroid (D) Hypothalamus TSH Pituitary gland 49. The given pie charts show the composition of three types of soil samples X, Y and Z. Which of the following is correct regarding these? (A) X is unable to hold water or nutrients. (B) Y is used for pot making. (C) Z provides good amount of oxygen to roots for breathing. (D) X is best suited for cultivation. 50. Refer the given flowchart and identify X, Y and Z. X Y Z (A) Biosphere Reserve Sanctuary National Park (B) Biosphere Reserve National Park Sanctuary (C) Sanctuary National Park Biosphere Reserve (D) National Park Biosphere Reserve Sanctuary SPACE FOR ROUGH WORK Class 8 16th Set A Year 2013  Mental Ability 1. Direction : If p * q = p 2 – q2 p $ q = p 2 + q2 B. p @ q = pq + p + q If p = 11 and q = 7, then the value of [(p * q) @ (p $ q)] C. D. A. 12492 B. 14282 C. 14292 D. 12482 2. The question given below is followed by three 6. In a survey, 240 parents of a school were asked statements. You have to study the question and the about the number of hours spent by their children statements and decide which of the statement(s) is/ on their study (including homework) in a day. The are necessary to answer the question: data obtained is represented by given pie. chart What is the rate of interest p.c.p.a. ? I. An amount doubles itself in 5 years on simple interest. II. Difference between the compound interest and the simple interest earned on a certain amount in 2 years is ` 400. III. Simple interest earned per annum is ` 2000. A. I only From this pie chart, find the number of students in B. II and III only each sector in terms of percentage. C. Any two of the three A. P = 20%, Q = 20%, R = 60% D. I only or II and III only B. P = 15%, Q = 60%, R = 25% C. P = 15 %, Q = 25 %, R = 60 % 3. If the sum of all 6's is subtracted from the sum of all D. P = 20%, Q = 60%, R = 20% 9's in the given below series, what will you get? 6 6 9 6 9 9 9 6 6 6 9 6 9 6 6 9 9 6 6 9 9 6 6 6 7. If P and S interchanges their position & Q and A. 9 B. 6 T interchanges their position, then which point is C. 18 D. 27 north-west of R ? P Q 4. In a zoo, there are rabbits and pigeons. If heads are A. P counted, there are 340 heads and if legs are counted B. Q R there are 1060 legs. How many pigeons are there? A. 120 B. 150 C. T C. 180 D. 170 S T D. S 5. Which of the following is the net of the prism shown 8. In the given figure, PQRS is a square and LMNP is below ? (figure is not drawn to scale) a rectangle. A straight line is drawn from L, passes through 'N' meets at R. Side of square is square root of 100. The area of unshaded region is ____ cm2 . A. 112.5 Q R B. 78 A. N C. 83.3 M D. None of these L P S 16th NSO - SET A 2 9. Which number will complete the number pattern 13. Find the odd figure out. given below? U W A. B. 30 46 A. Q X W B. S C. D. 48 48 C. R D. T 10. Which of the following statements is INCORRECT? A. Rhombus satisfies all the properties of a 14. The given figure shows the parallelogram & diagonals are perpendicular to net of a cube. Which one of each other. T the faces is the base of the B. Rectangle satisfies all the properties of a parallelogram. cube ? Q R S C. Square satisfies all the properties of a parallelogram, A. P top rhombus and a rectangle. B. T D. In kite, both the diagonals do not bisect each P C. R other. D. S 11. If A → E, B → F, C → G and H → L, then how 15. Which of the following options is the correct mirror will you code ‘GO AHEAD’? image of figure (X), if the mirror is placed vertically A. KS FLIFH to the left? B. HP BIFBE C. KS GLIGH D. KS ELIEH 12. In the given figure, AE = BC and AE || BC and the three sides AB, CD and ED are equal in length. If m∠ A = ( 10404 ) , find ∠BCD. A. B. A. 138° B. 162° C. 88° C. D. D. 152° Science 16. A brick of weight 80 N stands upright on the ground 17. Read the given statements and mark the correct as shown in the figure. The pressure exerts on the option. ground by brick is Statement 1 : It is difficult to move by a cycle along the road with breaks on. 5 × 10 A. × 10−4 N m −2 Statement 2 : The sliding friction is greater than the 80 rolling friction. B. 80 × 5 × 10–4 N m–2 A. Both statements 1 and 2 are true and statement 10 2 is the correct explanation of statement 1. C. N m −2 B. Both statements 1 and 2 are true but statement 80 × 5 × 10−4 2 is not the correct explanation of statement 1. 80 C. Statement 1 is true and statement 2 is false. D. −4 N m −2 10 × 5 × 10 D. Both statements 1 and 2 are false. 16th NSO - SET A 3 18. A body is acted upon by a constant force directed 24. An object of weight W is pulled along a rough, towards a fixed point. The magnitude of the force horizontal surface by a force X. The force of friction varies inversely as the square of the distance from is Y. Which diagram correctly shows the direction the fixed point. What is the nature of the path? of these forces on the object? A. Straight line B. Circle C. Random motion D. Can't say A. B. 19. Shweta observes lightning in her area. She hears the sound 5 s after she observed lighting. How far is she from the place where lightning occurs if speed C. D. of sound in air is 330 m s–1. A. 1.65 km B. 2.55 km C. 3.65 km D. 4.55 km 25. Oxygen can be supplied to a fish tank by bubbling air in to water. The pressure and the volume of the 20. The figure shows a barrier placed at right angles to air bubbles while they are rising respectively a plane mirror with four lamps at position P, Q, R A. Decreases, increases and S. Which lamp can be seen by the observer? B. Decreases, decreases C. Increases, decreases D. Increases, increases 26. By using a concave mirror, image of a tree is focused on a screen. The distance between the screen and the mirror is A. Equal to twice the focal length of the concave A. P B. Q mirror. C. R D. S B. Equal to one fourth of the focal length of the 21. While playing a violin, in which of the following concave mirror. the vibrations can take place? C. Equal to half the radius of curvature of the concave mirror. A. The wire only D. Equal to the radius of curvature of the concave B. Air only mirror. C. The box only D. Both the wire and box 27. A ball is dropped from a spacecraft revolving the earth at a height of 100 km. What will happen to 22. John carried out an experiment to find out how the ball? different surfaces (P, Q, R and S) effect the distance A. It will continue to move with the same speed along a car travelling at 50 km/h needed to stop once the the original orbit of spacecraft. brakes are applied. B. It will move with the same speed, tangentially to The results are shown below: the spacecraft. Type of road surfaces P Q R S C. It will go very far in the space. Stopping distance (m) 18 15 19 27 D. It will fall down to earth gradually. Which type of road will provide the most friction 28. If °C, °F and K are the temperatures on Celsius, for the car to stop? Fahrenhit and Kelvin scales. D°C, D°F and DK are A. P B. Q the change in temperatures in Celsius, Fahrenheit C. R D. S and Kelvin scale respectively. Which relation among 23. Bees which are not carrying honey fly with a flapping the following is correct? frequency of 440 Hz while those which are carrying °C ° F K − 273 °C ° F K A. = = B. = = honey fly with a flapping frequency of 300 Hz. The 9 5 5 5 9 5 sound made by bees which are not carrying honey ∆°C ∆° F ∆° K C. = = has 5 9 5 A. A lower pitch B. A higher pitch ∆°C ∆° F − 32 ∆K − 273 D. = = C. A smaller loundness D. A greater loudness 5 9 5 16th NSO - SET A 4 29. Solve the following riddles by identifying X, Y and Z. X : Your mother loves to cook in the utensils which are coated with me because I make them X Y Z non-stick. A. Water, Crude oil, Natural gas Y : I protect the firemen by coating their uniforms B. Water, Natural gas, Crude oil to make them fire resistant. C. Crude oil, Water, Natural gas Z : I am a very familiar form of polyester and used D. Natural gas, Water, Crude oil for making bottles, utensils, films, etc. X Y Z 33. Fill in the blanks by choosing the correct option. A. Acrylic, Rayon, Bakelite Excessive use of fertilizers makes the soil _______, B. PET, Polythene, Teflon so it should be treated with _______ like _______. C. Rayon, Bakelite, Melamine If the soil is _______ then organic matter should be D. Teflon, Melamine, PET added to it. A. Basic, acids, formic acid, acidic 30. Mr. Goyal, a science teacher showed the following B. Basic, acids, milk of magnesia, neutral experimental set up to the students. Which of C. Acidic, bases, zinc carbonate, neutral the following is the correct observation and its D. Acidic, bases, slaked lime, basic explanation? 34. Study the given figures carefully and identify the types of changes shown. A. The paper pan catches fire and the water spills all over the wire mesh because paper is inflammable. B. The paper pan has a very high ignition temperature so it does not catch fire. C. The water in the pan absorbs heat from the candle flame and thus prevents the paper to reach the A. X and P are physical while Y and Q are chemical ignition temperature. changes. D. The paper pan helps the water vapours to condense B. X, Y and P are physical changes while Q is a back to water. chemical change. C. X is a physical change while Y, P and Q are 31. Match the column I with column II and choose the chemical changes. correct option using the codes given below. D. All are physical changes. Column I Column II (a) Used in thermometers (i) Iodine 35. Ritu was given four test tubes containing different (b) Present in fertilisers (ii) Mercury solutions as shown in the figure. (c) Used to disinfect water (iii) Phosphorus (d) Used as an antiseptic (iv) Chlorine A. (a)-(iii), (b)-(i), (c)-(ii), (d)-(iv) B. (a)-(ii), (b)-(iii), (c)-(iv), (d)-(i) C. (a)-(i), (b)-(ii), (c)-(iii), (d)-(iv) D. (a)-(iv), (b)-(ii), (c)-(i), (d)-(iii) Choose the incorrect option. 32. Petroleum and natural gas are often found together A. 1 and 2 turn blue litmus to red. as large deposits deep inside the earth’s crust. What B. 1 and 4 turn China rose indicator to green. is the correct order in which they are present in the C. Phenolphthalein remains colourless with 2 and 3. D. 4 turns turmeric solution to red. earth? 16th NSO - SET A 5 36. Priya wants to carry out a fair test to find out how A. He should put more water in the field to provide fast water can pass through four different kinds of adequate irrigation. soil. She sets up the experiment as shown in the B. He should leave field free for one or more figure below. She uses a stopwatch to measure the season. time taken for water to pass through each kind of C. He should grow legume crop in next season to replenish nitrogen in the soil. the soil. D. Both B and C 40. A person on entering a dark room finds a snake. Due to fear his body becomes stiff and the heart starts to beat fast. Which of the following is likely to happen to his She records her findings in the table below. hormonal control system as shown? Kind of soil P Q R S A. Secretion of adrenaline Time taken (in seconds) 33 23 45 18 from part labelled Q. Which type of soil is suitable to grow lentils? B. Secretion of thyroxine A. S B. P from part labelled P. C. Q D. R C. Secretion of adrenaline from part labelled R. D. Secretion of TSH from part labelled Q. 37. Which of the following is incorrect for the organism as shown? 41. Study the given flow chart carefully. A. It lives in extremely cold conditions where the water is always below the freezing temperature. B. Its body is streamlined, feet are webbed and is excellent swimmer. C. It is a solitary animal who live alone near the sea. D. It huddles together in groups to keep each other warm. 38. After hearing Mr. Saxena's countless and justified Which of these is/are incorrect in the above flow explanations on his problem, the doctor said, "Okay! chart? in that case, your request for permanent contraception A. Asiatic lion and lion tailed macaque is granted. I shall sterilize you on the 18th December B. Vulnerable species 2013. You will have all your male characteristics C. Dodo intact, so don't worry." D. Golden cat and chinkara deer Which of the following procedure Mr. Saxena will 42. Study the given figures and select the correct statements be going through? regarding these. A. in vitro fertilization B. His vas deferens will be cut and tied C. His seminal vesicle will be removed D. His prostate gland will be removed and testes will be cut and tied. 39. Ramu, a farmer, grew wheat on the same field for many years. He noticed that the yield of wheat is (i) Figure X represents a unicellular alga. decreasing every year. What do you think he should (ii) Figure Y represents a parasitic protozoan. (iii) Organism in figure X cannot synthesize its own do to rectify this? food. 16th NSO - SET A 6 (iv) Organism in figure Y shows mixotrophic mode of 44. Select the correct sequence of words to fill up the nutrition. blanks in the given paragraph. A. (i), (ii), (iii) and (iv) B. (i) and (iv) Wool is the _____ of a sheep. It is removed from the C. (i), (iii) and (iv) D. (ii) and (iii) sheep by a process called ______. When it goes to 43. Rita wants to study the process of respiration in mill, wool is cleaned to remove dirt and grease by a animals. She sets up an experiment using five insects process known as ________. Clean wool is _______ of the same species and size as shown in the set- to remove tangles. Long and soft wool strands are up below. She provides the insects with food and spun into _____ which is woven on looms. water above S which removes the end product of A. Hair, Shearing, Carding, Scoured, Yarn respiration. B. Fleece, Scouring, Shearing, Carded, Yarn C. Hair, Shearing, Scouring, Carded, Fabric D. Fleece, Shearing, Scouring, Carded, Yarn 45. Refer the given figures and select the incorrect option. Which of the following is correct regarding the given set-up? A. S is KOH and is used to remove CO2. B. By measuring the height moved by red-coloured water in glass tube, Rita can measure the volume A. P reproduces vegetatively by underground stem of air used by the insects for respiration. called rhizome. C. Rita should set-up a control by preparing the same B. Q reproduces asexually by buds on its leaves. set-up without the insects. C. R reproduces by the process of fragmentation. D. Both A and B D. S reproduces by the process of budding. Achievers Section Direction (Q. 46 & 47) : Refer the given passage and 48. Consider the following statements (a – d) each with answer the following questions. one or two blanks. The graph in the figure shows the position of a body at (a) At puberty the (1) begins to grow in boys, different times. which protrudes out in the throat region as Adam's apple and marks the (2) of adolescence. (b) Every cell has (3) lifespan. (c) On reaching the uterus, the embryo attaches to the wall of uterus by (4) . This is called (5) . (d) Some factories use (6) to remove particles of solids such as carbon dioxide from waste gases 46. What is the speed of the body as it moves from A before they are let out into the atmosphere. to B? A. 2-End, 4-Umbilical cord, 5-Pregnancy, 6-Catalytic A. 1 cm/s B. 2 cm/s converter C. 3 cm/s D 4 cm/s B. 1-Larynx, 3-Indefinite, 5-Implantation 47. What is the speed of the body as it moves from C C. 1-Pharynx, 2-Start, 4-Umbilical cord to D? D. 1-Larynx, 3-Definite, 4-Placenta, 6-Electrostatic A. 1 cm/s B. 4 cm/s precipitators C. 8 cm/s D. 2 cm/s 16th NSO - SET A 7 49. Kunal performed an activity using the shown C. P is CO2 , Q turns lime water milky. experimental set up. D. P is CO2 gas, Q is hydrogen gas. 50. As proved by many studies greenhouse effect is rapidly increasing because of increase in concentration of carbon dioxide. In the given graph the increase in carbon dioxide concentration is shown. What could be X corresponding to it? The balloon tied on bottle 1 rose and float away while that on bottle 2 could not. (i) Rate of photosynthesis in plants Choose the correct statement about the gases filled (ii) pH of the oceans in the two balloons. (iii) Water level of ocean A. P burns with a pop sound and Q is hydrogen (iv) Average global temperature of earth gas. A. (i) and (iii) B. (ii) and (iv) B. P is hydrogen gas, Q turns lime water milky. C. (ii) only D. (iv) only SPACE FOR ROUGH WORK Class 8 16th Set B Year 2013  Mental Ability 1. Which of the following statements is true? 7. The line graph shows the number of sandwiches sold A. Integers are rational numbers but fractions are each day at a shop. If the shop earned a profit of not. 60 paise for every sandwich sold, how much profit B. Fractions are rational numbers but integers are did the shop earn in one week? not. C. Neither integers nor fractions are rational numbers. D. Integers and fractions are rational numbers. 2. A direction pole was situated on the crossing. Due to an accident the pole turned in such a manner that the pointer which was showing East, started showing South. One traveller went to the wrong direction A. ` 636 B. ` 1060 thinking it to be West. In what direction actually C. ` 742 D. ` 128 he was travelling? A. East B. West 8. In the given question, which C. North D. South 18 24 32 number will replace the question mark? 12 14 16 3. If 3a = 4b = 6c and a + b + c = 27 29 , then A. 2 a 2 + b 2 + c 2 is 3 ? 4 B. 3 A. 3 29 B. 81 C. 4 72 112 128 9 D. 5 C. 87 D. 29 2 9. Direction : There is a question followed by three 4. There are 23 steps to reach a temple. On descending statements I, II and III. You have to study the from the temple Mohit takes two steps in the same question and the statements and decide which of time. Rohit ascends one step. If they start to work the statement(s) is/are necessary to answer the simultaneously, at which step will they meet each question. other? In how many days can P and Q working together A. 11th B. 9th to complete a job? C. 10th D. None of these I. P alone can complete the job in 30 days. II. Q alone can complete the job in 40 days. 5. Two positions of a cubic block are given below, each face having small triangles. If there is a triangle at III. Q takes 10 days more than P to complete the job. the bottom, how many triangles will be there on the A. I and II only top face? B. II and III only A. 4 C. I and III only B. 3 D. Any two of the three C. 2 10. The given figure shows two rectangles. D. 5 6. The figure shows a cuboid with a square face. The perimeter of this square face is 20 cm. The volume of the cuboid is 525 cm3. Find the length of p. A. 50 cm If q is four times as much p and q is twice as much B. 102 cm as r, what is the value of r? C. 20 cm A. 18° B. 54° D. 21 cm C. 36° D. 72° 16th NSO - SET B 2 11. What will the solid look like if viewed from the 13. Consider the figures X, Y and Z showing a sheet of top? paper folded and punched as shown in figures. Select the figure from the options which will most closely resemble the unfolded position of figure (Z). A. B. A. B. C. D. C. D. 14. If = 34.03 kg and = 39.590 kg, 12. Which of the following options will continue the then = ? series in the problem figure? A. 121.42 B. 55.56 C. 45.56 D. 65.89 15. The given cuboid is made up of white unit cubes. The outside of the cuboid is then painted blue. How many unit A. B. cubes are not painted blue on any of their surfaces? A. 4 C. D. B. 8 C. 12 D. 16 Science 16. Two blocks A and B are released at the top of a 18. A piece of ice is floating in a beaker containing rough inclined plane so that A slides along the plane water. When ice melts, the temperature falls from and B falls down freely. Which will have higher 20°C to 4°C and the level of water velocity on reaching the ground? A. Remains unchanged A. A B. Falls C. Rises B. B D. Change erratically C. Both will reach the ground with same velocity D. It depends on the coefficient of friction 19. Two wave pulses travel in opposite directions on a string and approach each other. The shape of one 17. Two plane mirrors are inclined to each other at an pulse is inverted with respect to the other. angle of 60°. If a ray of light incident on the first A. The pulse will collide with each other and vanish mirror is parallel to the second mirror, it is reflected after collision. from the second mirror B. The pulses will reflect each other, that is pulse going towards right will finally move towards left A. Perpendicular to the first mirror and vice versa. B. Parallel to the first mirror C. The pulses will pass through each other but their C. Parallel to the second mirror shapes will be modified. D. Perpendicular to the second mirror. D. The pulses will pass through each other without any change. 16th NSO - SET B 3 20. John carried out an experiment to find out how 25. The given figure shows a beaker containing a solution different surfaces (P, Q, R and S) effect the distance of copper sulphate and two carbon electrodes. a car travelling at 50 km h–1 needed to stop once the brakes are applied. The results are shown below Which type of road will provide the most friction A battery is placed next to it. In order that the for the car to stop? electrode E be plated with copper ____. A. P B. Q A. E must be connected to H and F to G C. R D. S B. E must be connected to F and H to G C. E must be connected to G and F to H 21. A particle follows a path XY as shown in the given D. E and F must be connected to G figure. If the radius of semi-circular path is 2 cm then the approximate value of distance covered and 26. The temperature of the substance remains constant displacement of the particle are respectively. when it is melting and boiling though some quantity of heat is supplied. What happens to this energy? A. It is dissipated as sound energy. B. It is consumed to increase the energy of the molecules. A. 20 cm and 10 cm B. 30 cm and 23 cm C. It is used to change the state of the substance. C. 20 cm and 60 cm D. 63 cm and 40 cm D. It is still an unsolved problem in science. 22. Read the following statements and select the correct 27. Match Column-I with Column-II and mark the correct option. option. Statement-1 : A convex mirror is preferred over a Column-I Column-II plane mirror in vehicles to observe traffic coming (a) Richter scale (i) Electric Charge from behind. (b) Electroscope (ii) Amber Statement-2 : Images formed by convex mirror are (c) Resin (iii) Earthquake erect and diminished in size. (d) Electric current (iv) Flow of charges A. Both statements-1 and 2 are true and statement-2 A. a-(iv), b-(ii), c-(i), d-(iii) is the correct explanation of statement-1. B. a-(iii), b-(i), c-(ii), d-(iv) B. Both statements-1 and 2 are true but statement-2 C. a-(i), b-(iii), c-(iv), d-(ii) is not the correct explanation of statement-1. D. a-(ii), b-(iv), c-(i), d-(iii) C. Statement-1 is true and statement-2 is false. 28. Which graph shows the relationship between the D. Both statements-1 and 2 are false. pressure and volume of a fixed mass of a gas in a 23. Lunar eclipse occurs when earth comes in between container at constant temperature? sun and the moon. Solar eclipse occurs when moon comes in between sun and earth. This suggests that A. B. A. Both eclipses occur on a new moon day. B. Solar eclipse occurs on a new moon day. C. Lunar eclipse occurs on a new moon day. D. Both eclipses occur on a full moon day. C. D. 24. At particular time of a day, the ratio of height of an object and the length of it’s shadow is x. Using this, calculate the height of a tree if the length of 29. Any article of iron if left in open for some time, the shadow of tree is L. x acquires a film of brownish substance (rust) having A. B. x × L chemical formula________. L A. Fe3O4 B. Fe2O3 C. x + L D. L–x C. FeO D. Fe(OH)2 16th NSO - SET B 4 30. Raman was given four slips with one problem written Choose the correct advantages. on each slip. Four bottles labelled from 1 to 4 were A. (i), (ii) and (iii) B. (i), (iii) and (iv) kept in front of him. C. (ii), (iii) and (iv) D. (i), (ii) and (iv) a. Excessive use of 1. Magnesium fertilizers in the soil hydroxide 34. Read the following statements carefully and identify b. Too basic soil 2. Zinc carbonate P, Q and R. c. Ant bite 3. Organic matter P : Obtained from petroleum and natural gas and used d. Indigestion 4. Calcium hydroxide in the manufacture of man-made plastics. Identify the bottles that he should pick as remedy Q : Due to its great commercial importance, it is for each of the given problems. also called 'black gold'. A. a-3, b-2, c-4, d-1 R : Obtained from natural gas and used in the B. a-3, b-4, c-1, d-2 production of fertilizers. C. a-2, b-3, c-1, d-4 P Q R D. a-4, b-3, c-2, d-1 A. Petrochemicals, Petroleum, Hydrogen gas B. Coke, Coal, Coal tar 31. Ms. Chopra, a science teacher prepared two solutions C. Paraffin wax, Coal tar, Diesel for practical test as follows: D. Bitumen, Coke, Coal gas Solution 1 : Dissolved the ash collected after burning 35. Few uses of metals are shown below. the magnesium ribbon in water. Solution 2 : Added dilute sulphuric acid to lime water. She asked a student to test the solutions with China rose indicator and write the change in colour. Choose X Y the correct observation among the following. A. Solution 1 → Red, Solution 2 → Green B. Solution 1 → Green, Solution 2 → Pink C. Solution 1 → Red, Solution 2 → Pink D. Solution 1 → Green, Solution 2 → Green 32. I am a man-made fibre, stronger than a steel wire. Z Some of my uses are shown in the figures: Identify the properties which are responsible for the uses X, Y and Z respectively. A. Conductivity, Malleability, Ductility B. Ductility, Malleability, Sonorous C. Sonorous, Malleability, Ductility D. Malleability, Ductility, Sonorous 36. Match Column I having characteristics of gas exchange surfaces with Column-II having their respective I II purposes and select the correct option. Who am I? Column-I Column-II A. Polyester B. Acrylic (a) Moist surface (i) Keeps high C. Nylon D. Rayon concentration gradient of gases 33. Liquid and gaseous fuels have more advantages over (b) Single layer (ii) Allows faster diffusion solid fuels. Some of the advantages are : of epithelial of gases (i) Calorific value of liquid and gaseous fuels is cells higher than the solid fuels. (c) Well ventilated (iii) Allows gases to dissolve (ii) Liquid and gaseous fuels have higher ignition (d) Large surface (iv) Allows larger amount of temperatures than the solid fuels. area gases to diffuse (iii) Liquid and gaseous fuels are easier to store A. a-(iii), b-(iv), c-(ii), d-(i) since solid fuels occupy lot of space. B. a-(iii), b-(ii), c-(i), d-(iv) (iv) Liquid and gaseous fuels burn completely not C. a-(i), b-(ii), c-(iii), d-(iv) leaving any residue. D. a-(ii), b-(iv), c-(iii), d-(i) 16th NSO - SET B 5 37. 41. Mrs Renu came to know about Mrs Sunidhi's pregnancy, but she became anxious as Mrs Sunidhi smokes badly. She knew that smoking may affect the health of the mother and developing foetus. Among the following, what are the consequences of smoking? (i) Increased heartbeat and blood pressure in the mother due to release of adrenaline. (ii) Increased blood supply to the placenta. The given figure shows a part of digestive system. (iii) Blood clot formation in the arteries of the mother Identify it and select its main function. leading to the diffusion of CO2 and urea into A. Gall bladder : Carries the digested food to all parts the foetus' blood. of the body. (iv) Reduced ability of haemoglobin to carry oxygen B. Part of pancreas : Produces digestive juices to in the RBC, which may affect the development digest the food in small intestine. of the foetus' brain. C. Villus : Makes a large surface area for the effective A. (ii) and (iii) B. (i), (ii) and (iv) absorption of digested food. C. (i) and (iv) D. (ii) and (iv) D. Oesophagus: Helps the movement of undigested food into the large intestine. 42. Which of the following statements is incorrect for the organism shown in the figure? 38. Read the following statements and select the correct option. Statement 1 : Wind pollinated flowers need to produce more quantities of pollen grains. Statement 2 : Seeds from cross pollinated flowers produce weaker and less healthy plants. A. Both statements 1 and 2 are true and statement 2 is the correct explanation of statement 1. A. This organism became extinct due to over B. Both statements 1 and 2 are true but statement 2 exploitation. is not the correct explanation of statement 1. B. The category to which this organism belongs also C. Statement 1 is true but statement 2 is false. contains Quagga and Tasmanian wolf. D. Both statements 1 and 2 are false. C. This organism is listed in Red Data Book. 39. Which of these can be found in a tropical rainforest? D. This organism is critically endangered due to A. Sloth and Lion-tailed macaque continuous illegal poaching. B. Camels and Cacti 43. Sewage contains several dissolved and suspended C. Lemmings and Penguins impurities which pollute the water and leads to D. Arctic tern and Siberian cranes various changes. These are 40. Refer the given figure and select the option which (i) Water becomes green (ii) Eutrophication correctly describes parts labelled as W, X, Y and Z. (iii) Underwater plants die (iv) Light cannot penetrate the water (v) Depletion of dissolved oxygen (vi) Death of aquatic organisms (vii) Aerobic bacteria feed on dead plants In which order these changes take place? A. (i) → (ii) → (iv) → (iii) → (vii) → (v) → (vi) Codes: B. (ii) → (i) → (iv) → (vi) → (v) → (iii) → (vii) a. Contains hereditary materials C. (i) → (ii) → (iv) → (iii) → (vii) → (vi) → (v) b. Most chemical reactions occur here D. (ii) → (i) → (iv) → (iii) → (vii) → (v) → (vi) c. Made of mainly sugar molecules d. Partially permeable 44. Which of the following groups represents the bacterial W X Y Z diseases? A. a c d b A. Cholera, tuberculosis, malaria, measles B. a b c d B. Small pox, tuberculosis, malaria, typhoid C. a b d c C. Cholera, tuberculosis, typhoid, measles D. b a c d D. Cholera, anthrax, tuberculosis, typhoid 16th NSO - SET B 6 45. The given figure shows the nitrogen cycle. Match Bacteria Letters the following table according to the given figure and (a) Able to form nodules (i) R select the correct option. with plants (b) Able to denitrify (ii) Q (c) Able to nitrify (iii) S (d) Able to use ammonium (iv) T as energy source (e) Able to fix nitrogen from (v) P air a b c d e A. (iv) (v) (i)/(ii) (i) (ii)/(v) B. (v) (iv) (iii) (iv) (v) C. (v) (iii) (i) (iv) (ii) D. (v) (iv) (i)/(iii) (i) (ii)/(v) Achievers Section Direction (Q. 46 & 47) : Refer the given passage and 48. Bacterial growth is the division of bacteria into its answer the following questions. daughter cells. When bacteria are grown in a culture, A mirror of length 2X is kept in front of a road as shown they initially adjust to new medium and then start in figure. A point object is kept at a distance X from the dividing rapidly, consuming available food reservoir mirror. An observer is able to see the image till distance uninhibited. In sometime, the growth becomes limited, 12 X while moving along the road. bacteria stop dividing and eventually die. Which of the following graphs best exhibits bacterial growth in the culture at an optimum temperature over a 24-hour period? A. B. 46. What is the distance Y between the road and the mirror in terms of X? A. Y = X B. Y = 12X C. Y = 5X D. Y = 2X C. 47. When we stand in front of a mirror, we can see only a part of the image depending on the length of the mirror because A. The image of the rest of the body is not formed by the mirror B. Those reflected rays do not reach our eyes D. C. Highly diminished image is formed D. Virtual and inverted image is formed 16th NSO - SET B 7 49. A student performed the first set of experiments b. Vaccines employ the use of _____ (2)____. They give with four test tubes containing solutions and metal protection against _____(3)____ diseases. pieces as indicated in the figure. In the second set c. The _____ ____ Anopheles mosquitoes are carriers (4) of experiments, the metal pieces are interchanged of malaria and dengue is spread by _____ (5) ____ Aedes mosquito. between test tubes P and Q and also between test d. The crops that require more water for growth and tubes R and S. are sown in the month of June are called _____ (6) ____ crops, while those that require less water for growth and are grown during the winter season are called _____(7) ____ crops. e. Manual scattering of seeds in the field is called _____(8)____. In which test tube(s), no reaction will occur in both Select the correct option to fill any four or five sets of experiments? blanks. A. P and Q B. R A. (1) acidic (2) antibodies (3) bacterial (4) female. C. S D. R and S B. (1) alkaline (4) female (5) male (6) kharif 50. Consider the following statements (a-e) each with (7) rabi one or two blanks. C. (1) acidic (6) kharif (7) rabi (8) winnowing a. Lactobacillus promotes curdling of milk by creating D. (2) weak germs (4) female (5) female (6) kharif an _____ (1)____ environment. (7) rabi. SPACE FOR ROUGH WORK Class 8 17th Set A Year 2014 17th NSO - SET A 2 Logical reasoning 1. Select the option which will replace the question mark 6. If the alphabets are written in the reverse order after in the given number series. interchanging alphabets from ‘D to L’ with those from 10, 100, 200, 310, ? ‘R to Z’ respectively, which letter would be midway between W and E in the new order? A. 400 B. 410 C. 420 D. 430 A. Z B. N C. D D. None of these 2. Mr. ‘X’ shows three photographs to Mr. 'Y'. Pointing towards photograph 1, he says, “The person in photograph 7. If Fig. (X) is rotated one step in a particular direction, 1 is my uncle, who says ‘uncle’ to the person in photograph then identify its rotated form, from the given option 2, and the person in photograph 3 is called ‘uncle’ by figures. the person in photograph 2.” How is Mr. ‘X’ related to the person in photograph 2? A. Grandson B. Granddaughter Fig. (X) C. Great grandson D. None of these A. B. 3. At a dinner party, both fish and meat were served. Some took only fish while some took only meat. There were some vegetarians also who did not accept either of the two, while the rest accepted both fish and meat. Which of the following Venn diagrams C. D. correctly represents this situation? 8. Select a figure from the given options which will A. B. complete the given figure matrix. C. D. 4. Six people P, Q, R, S, T and U are sitting on the ground in a hexagonal shape. All the sides of the hexagon, so formed, are of same length. P is not adjacent to Q or R; S is not adjacent to R or T; Q and R are adjacent; U is in the middle of S and R. Who is at the same distance from S as T is from S? A. Q A. B. B. R C. U D. Can't be determined 5. Select the pair of figures which satisfies the same C. D. conditions of placement of dots. 9. Three of the following four numbers are alike in a certain way and so form a group. Which of the following does not belong to that group? A. I, II B. II, III A. 143 B. 399 C. III, IV D. I, IV C. 759 D. 257 17th NSO - SET A 3 10. There are seven figures, the first and last of What will come in place of (b)? which are unmarked and remaining are marked as A. 21 B. 23.5 P, Q, R, S and T. However, the series will be established C. 19.5 D. 16 only if the positions of two of the marked figures are interchanged. Find the figures. 13. There are five different successive figures showing movement of the hands in a clock. Identify the pattern and find the next figure. A. PQ B. QR C. QT D. ST 11. A pile of cubes of equal size is arranged in the form of A. B. a block as shown in the figure. If the block is dipped into a bucket filled with red paint, so that only the surfaces of the block get coloured, then how many C. D. cubes are coloured on three faces only? A. 14 14. In a code language, each of the vowels, i.e., A, E, I, O and U, is substituted by the letter preceding it, while B. 15 a consonant is substituted by the nearest vowel. How can the word EVIDENCE be written in that code? C. 16 A. DUHJEDOED B. DUHEDUAD D. 12 C. DUJEDOAD 12. Two series in two rows are given below. In the first D. DUHEDOAD OR DUHEDOED row, a full series is given which follows a specific 15. At my farmhouse I am facing East, then I turn left pattern. The second row has a series, similar to the and walk 10 metres. I again turn right and walk 5 first series but only first element of this series is given, metres. Again I go 5 metres towards the South, and followed by (a), (b), (c), (d) and (e), representing the from there walk 5 metres towards the West. In which subsequent elements. Complete the series and answer direction am I from my farmhouse ? the question that follows : 7 24 10 33 14.5 46.5 A. East B. West 11 (a) (b) (c) (d) (e) C. North D. South Science 16. When a constant force acts on a mass, and the mass 18. The displacement-time graph of a s starts moving from rest, then the body in motion is shown here. The (i) acceleration is constant corresponding velocity-time graph (ii) velocity increases at a constant rate will be t (iii) distance travelled is directly proportional to the v time. v Which of the above statements is/are correct? A. (i) only B. (i) and (ii) only A. t t B. C. (i) and (iii) only D. (ii) and (iii) only 17. Which planet is called the morning star as well as the v v evening star, depending on its position with respect to the sun? C. D. t A. Mercury B. Venus C. Mars D. Saturn t 17th NSO - SET A 4 19. A man standing in front of a large wall, claps two A. Both statements 1 and 2 are true and statement 2 objects against each other at an interval of 1.2 s is the correct explanation of statement 1. regularly. The echo of the first clap coincides with B. Both statements 1 and 2 are true but statement 2 the fifth clap. If the speed of sound in air is 340 m s–1, is not the correct explanation of statement 1. the distance between the man and the wall is ____. C. Statement 1 is false but statement 2 is true. A. 408 m B. 1632 m D. Both statements 1 and 2 are false. C. 816 m D. 204 m 25. A cube of side 0.2 m rests on the floor, 20. The image formed by the side-view mirror of an as shown. Given that the cube has a automobile is mass of 50 kg, the pressure exerted by 50 kg (i) of the same size as that of object (ii) virtual and diminished the cube on the floor is ________. 0.2 m (iii) erect and real (Take g = 10 N kg–1) (iv) erect and magnified. A. 25 N m–2 B. 250 N m–2 Which of the following statements is/are correct? C. 1250 N m–2 D. 12500 N m–2 A. (i) only B. (ii) only C. (i) and (iii) only D. (iii) and (iv) only 26. In an electrical circuit containing a battery, the positive charge inside the battery ________. 21. The diagram shows a man standing at a position M in front of a plane mirror, a distance of x m from the A. always goes from positive terminal to the negative mirror. terminal B. may go from positive terminal to negative terminal C. always goes from the negative terminal to positive terminal D. does not move When the man moves 3 m away from the mirror, the 27. A plank is supported on the steps of a staircase as new distance between the man and his image becomes shown in the figure. How many forces are acting on 12 m. What is the value of x? the plank? A. 1 m B. 2 m C. 3 m D. 4 m A. 4 Plank B. 5 22. A substance in gaseous form is being cooled to solid state. Its temperature will remain constant when the C. 6 substance is D. 7 (i) in condensing phase 28. How do cyclones decrease the fertility of soil in the (ii) in freezing phase (iii) at thermal equilibrium with the environment. coastal areas? A. (i) only B. (iii) only A. By flooding the land with saline water. C. (i) and (ii) only D. (i), (ii) and (iii) B. By dissolving soil and rocks. C. By increasing the water table of the place. 23. During a track and field meet, the time difference between seeing the smoke from a starter's gun and D. By decreasing the water table of the place. hearing the bang would be less ______. 29. Read the given statements and select the correct A. On a warmer day option. B. On a cooler day C. If a more powerful shell were used Statement-1 : Petroleum is called ‘black gold’. D. If a less powerful shell were used Statement-2 : Petroleum is a dark oily liquid. A. Both statements 1 and 2 are true but statement 2 24. Read the given statements and mark the correct is the correct explanation of statement 1. option. B. Both statements 1 and 2 are true but statement 2 Statement -1 : A convex mirror always forms a real image. is not the correct explanation of statement 1. Statement -2 : A diverging beam incident on a convex C. Statement 1 is true but statement 2 is false. mirror is reflected as a diverging beam. D. Both statements 1 and 2 are false. 17th NSO - SET A 5 30. Read the table carefully. 33. Identify V, W, X, Y and Z in the given Venn diagram. S. Reaction Product Characteristic No. formed test 1. Copper vessel Green Turns red exposed to moist coating litmus solution air. blue. 2. Aluminium foil Colourless, Burns with a dipped in fresh odourless pop sound. solution of sodium gas hydroxide. 3. Rusting of iron. Reddish Turns red brown litmus solution V W X Y Z deposit blue. A. Filling Withdrawing Burning Charging Boiling a water money from a candle mobile an egg 4. Burning of sulphur Colourless, Turns blue bottle ATM battery powder. suffocating litmus solution B. Filling Charging Burning Withdrawing Boiling gas red. a water mobile a candle money from an egg bottle battery ATM Identify the products formed and their nature. C. Burning Charging Filling Boiling Withdrawing A. (1) Cu(OH)2 , CuCO3; basic (2) H2; neutral a candle mobile a water an egg money from (3) Fe2O3; basic (4) SO2; acidic battery bottle ATM D. Boiling Filling Withdrawing Charging Burning B. (1) CuO; basic (2) O2; neutral an egg a water money from mobile a candle (3) Fe3O4; basic (4) H2S; acidic bottle ATM battery C. (1) Cu(OH)2 , CuCO3; basic (2) H2; neutral 34. Different mixtures are taken in four different test (3) Fe2O3; acidic (4) SO2; basic tubes and each of them is tested with indicators as D. (1) Cu; basic (2) H2O; neutral shown below : (3) FeO, basic (4) SO3; basic 31. Which of the following examples are periodic Methyl orange Turmeric solution changes? 5 mL Sour milk Pinch of baking powder I. Occurrence of eclipse. + 5 mL Lime water + 5 mL Water II. The flowering of jasmine bush. (1) (2) III. Occurrence of new moon. IV. Opening and closing of stomata. V. Appearance of rainbow. Phenolphthalein China rose VI. Rotation of earth. Pinch of salt 5 mL Lemon juice VII. Blinking of eyes. + 5 mL Sugar + 5 mL Tamarind juice VIII. Twinkling of stars. (3) (4) A. I, V, VII and VIII Select the incorrect observation. B. I, II, III and IV A. No change in colour in test tubes 1 and 3. C. II, III, IV and VI B. Turmeric solution turns red in test tube 2. D. All are non-periodic changes. C. China rose turns magenta in test tube 4. D. None of the above 32. Neha, a class VIII student arranged the following experimental set-up and observed the changes 35. Match the articles given in Column-I with the carefully. fibres/plastics from which they are made in Column-II. Column-I Column-II (a) Toothbrush bristles (i) Melamine (b) Carpet (ii) PVC (c) Bottle (iii) Nylon (d) Toy (iv) Rayon (e) Fire resistant fabric (v) PET On the basis of her observations identify the correct A. (a)-(i), (b)-(iv), (c)-(ii), (d)-(v), (e)-(iii) order of reactivity. B. (a)-(iv), (b)-(ii), (c)-(iii), (d)-(i), (e)-(v) A. Zn > Cu > Fe B. Zn > Fe > Cu C. (a)-(iii), (b)-(iv), (c)-(v), (d)-(ii), (e)-(i) C. Fe > Zn > Cu D. Cu > Fe > Zn D. (a)-(iii), (b)-(v), (c)-(iv), (d)-(i), (e)-(ii) 17th NSO - SET A 6 36. The manufacture of bread, beer and wine involves 40. The names of some plants are given below in the alcoholic fermentation of glucose to ethanol by yeast. list : Which of the following five statements concerning I. Lady’s finger VI. Grass this process are correct? II. Drumstick VII. Xanthium I. Yeast carries out fermentation because yeast III. Balsam VIII. Madar cells lack mitochondria. IV. Urena IX. Sunflower II. For every molecule of ethanol produced, one V. Maple X. Coconut molecule of CO2 evolves. Match these plants with the mode of dispersal of their III. For every one molecule of glucose fermented, fruits/seeds and select the correct option. net two molecules of ATP are generated. Wind Animals Water Bursting IV. More than 80% of the chemical energy of the of fruits glucose is released as heat. A. II, V, VI, VIII, IX III, IV, VII X I V. Glycolysis is an integral part of this B. II, V, VI, VIII, IX IV, VII X I, III fermentation. C. V, VI, IX II, IV, VII X I, III, VIII A. II, III and IV B. I, II, III and V C. II, III and V D. I, IV and V D. II, VI, VII, VIII I, IX X III, IV, V  37. Thyroxine controls _______ in frogs and the development 41. of _______ and ______ during embryonic development of other vertebrates. Thyroxine production requires the presence of ______ in diet. Select the correct sequence of words to complete the above passage. A. Development, Circulatory system, Muscles, Iodine B. Metamorphosis, Circulatory system, Muscles, Calcium C. Development, Bones, Nervous system, Iron Some steps involved in the treatment of water in a D. Metamorphosis, Bones, Nervous system, Iodine wastewater treatment plant are labelled as P, Q, R and S in the above diagram. The table given below shows 38. The given pie charts show the composition of three () for those steps in which the particular process types of soil samples X, Y and Z. is occurring while () for those in which it is not Which of the following is correct regarding these soil occurring. Which among these is/are incorrect? samples? Process P Q R S I. Sludge removal     II. Anaerobic decomposition     III. Cleaning of clarified watery waste     A. X is unable to hold water or nutrients. B. Y is used for pot making. IV. Disinfection of treated water     C. Z provides good aeration to plant roots. A. I and II B. III and IV D. X is best suited for cultivation. C. II only D. None of these 39. Read the given statements and select the correct 42. According to the extent of threat to a species and option. Statement-1 : Chloroplast and mitochondria are its population in its natural habitat, four categories have semi-autonomous organelles. been identified which are given below : Statement-2 : Chloroplast and mitochondria have their I. Extinct in wild own DNA and protein synthesizing machinery. II. Critically endangered species III. Vulnerable species A. Both statements 1 and 2 are true and statement 2 IV. Endangered species is the correct explanation of statement  1. B. Both statements 1 and 2 are true but statement 2 Select the correct order of these species according is not the correct explanation of statement 1. to their conservation priority? C. Statement 1 is true and statement 2 is false. A. II > IV > I > III B. I > II > IV > III D. Both statements 1 and 2 are false. C. III > I > II > IV D. I > IV > III > II 17th NSO - SET A 7 43. Refer to the given figures of bacteria (X, Y and Z) Plant Z → The anthers were carefully removed, and and read the statements I, II & III regarding these. a paper bag was tied tightly around each Based on the given information, identify the bacterium bud. and select the correct option. Although all flowers later bloomed normally, only those on plant X, produced seeds. This result showed that in this species _____ pollination can take place. A. Only insect B. Only cross C. Only wind D. Either of A, B or C I. Bacteria X causes cholera. 45. Match Column I with Column II and select the correct II. Bacteria Y causes a disease which disrupts proper option from the codes given below. exchange of gases. Column I Column II III. Bacteria Z converts lactose sugar of milk to lactic acid. (a) SPM (i) Poisoning of bald eagles (b) Typhoid (ii) Green house gas A. X is Vibro cholerae. B. Z is Lactobacillus. (c) CO (iii) Vehicle exhaust C. Y is Salmonella typhi. D. Both A and C (d) CO2 (iv) Incomplete combustion 44. Following investigation was carried out using flower (e) DDT (v) Pathogens in polluted water buds growing on three plants of the same species. a b c d e Plant X → The anthers were carefully removed, and the A. iii v ii iv i buds left open to the air. B. i iii iv ii v Plant Y → The anthers were left untouched, and a paper C. iii iv v ii i bag was tied tightly around each bud. D. iii v iv ii i Achievers Section 46. A. I and II B. II only C. III only D. I and III 47. A large number of functions are performed by different hormones secreted by endocrine glands. Match the given functions (a, b, c, d and e) to the labelled glands in the figure and The given graph shows two crop fields (X and Y ) that select the correct option. have been treated by different types of materials for a. Maintains a steady nutrient replenishment, keeping other environmental level of glucose in the factors same. Given are some assumptions regarding blood. the crop fields and the materials used. Select the b. Helps in the growth of human body and also sends most correct one(s). signals to other organs to secrete hormones. I. Addition of chemical fertilizers in Y has resulted c. Controls secondary sexual characters and maintains in sudden increase in yield due to increased release pregnancy. of N, P, K nutrients, but it gradually declined as d. Controls rate at which food is oxidised by the cells continuous use of chemicals killed useful microbes to produce energy. that replenish the soil fertility. e. Increases blood pressure and heart rate, when the II. The difference in the two graphs indicates that the body experiences stress. crop fields X and Y are treated with fertilizer and a b c d e manure respectively, as fertilizer is beneficial for A. R P Q T S long time and gives durable yield whereas manure B. P R Q S T gives immediate yield but later causes problems. C. S P Q R T III. The highest peak in crop field X is slightly delayed because manure enriches soil fertility gradually. D. R P Q S T 17th NSO - SET A 8 Direction (Q.No. 48 and 49): Refer to the given passage 50. Sakshi performed two experiments as shown in figure and answer the following questions: 1 and 2, and recorded her observations in the table. Ram jogs from one end X to the other end Y of a straight 300 m road in 2 minutes 30 seconds, and then turns around and jogs 100 m back to point Z in another 1 minute. X Y Z 300 m 100 m Does paper pan Is ignition Observation burn? temperature of 48. What is Ram’s average speed and average velocity paper reached? while jogging from X to Y respectively? Figure 1 Figure 2 Figure 1 Figure 2 A. 1.0 m s–1 , 1.0 m s–1 I Yes Yes No Yes B. 3.0 m s–1, 2.0 m s–1 II Yes No Yes No C. 2.0 m s–1, 2.0 m s–1 III No Yes Yes Yes D. 4.0 m s–1, 1.0 m s–1 Find out the correct observation and the reason behind it from the options given below. 49. What is Ram’s average speed and average velocity A. I, paper has a higher ignition temperature than while jogging from X to Z respectively ? water. A. 2.0 m s–1, 1.9 m s–1 B. II, fireproof paper pan is used in figure 2. C. III, paper is non-inflammable. B. 5.1 m s–1, 9.1 m s–1 D. II, heat supplied to the paper pan is transferred to C. 1.0 m s–1, 1.0 m s–1 water by conduction, so ignition temperature of D. 1.9 m s–1, 0.9 m s–1 paper is not reached in figure 2. SPACE FOR ROUGH WORK Class 8 17th Set B Year 2014 17th NSO - SET B 2 Logical reasoning 1. Select a figure from the options in which Fig. (X) is 5. If in a code REQUEST is written as S2R52TU, then exactly embedded as one of its part. how will ACID be written in that code? A. BDJE B. 1394 C. B3J4 D. 1D3E A. B. 6. 8 is related to 81 in the same way as 64 is related to ________. A. 125 C. D. B. 137 C. 525 D. 625 2. Three positions of a dice are shown below. What is 7. Select a figure from the options which will continue the number opposite to the number 1 ? the given series. 6 1 5 11 1 4 4 4 11 1 1 3 5 6 3 ? 8 8 4 A. 2 6 6 B. 3 A. B. C. 5 4 5 6 6 D. 6 3. Vijay walks 10 kilometres towards North. From there, C. D. 4 he walks 6 kilometres towards South. Then, he walks 7 3 kilometres towards East. How far and in which 8. Study the series carefully and answer the question direction is he now with reference to his starting that follows. point? ∂ = b F 2 * K S 7 5 # $ PLV 8 @ M 6 ↑ Q G A. 5 kilometres West © 9 3 &TY£ B. 5 kilometres North-East What will come in place of question mark? C. 7 kilometres East If '= → 2', 'K → #' and 'P → M', then '↑ → ?'. D. 7 kilometres West A. 3 B. T 4. Find the mirror image of the Fig. (X), if the mirror C. 9 is placed vertically to the left. D. & 9. In first row, a series is given which follows a specific pattern. The second row has a series, similar to the Fig. (X) first series but only first element of this series is given. Identify the pattern and answer the question that follows. A. B. 6 18 36 108 216 648 2 a b c d e C. D. What will come in place of e ? 17th NSO - SET B 3 A. 482 13. Select a pair of figures which satisfies the same B. 344 conditions of placement of dots. C. 216 D. 420 10. In the given Venn diagram, find the region representing P Q R S T persons who are educated and employed but not confirmed in job. A. PR Educated Employed B. QS C. PS b D. QT c a d e Confirmed in job 14. Which of the following options will exactly make up the key Fig. (X) ? A. d B. e C. b D. a, b Fig. (X) 11. Which of the following figures will complete the A. B. figure matrix ? A. C. D. B. 15. A sheet of paper is folded in a particular manner and a punch is made. Select a figure from the options ? which will closely resemble the unfolded form of C. given sheet. D. 12. A is the brother of B. C is married to D. If C is the A. B. nephew of B, how is A related to D? A. Father-in-law B. Mother-in-law C. D. C. Son-in-law D. Daughter-in-law Science 16. The pressure of the water near the bottom of the 17. When the tension in the string of a guitar is increased, wall forming a dam does not depend on ______. but other factors remain unchanged, the sound A. The depth of the water produced ________. B. The cross-sectional area of the reservoir A. Is louder C. Density of water B. Has higher pitch D. Atmospheric pressure C. Has longer wavelength D. Travels faster 17th NSO - SET B 4 18. A windmill is pushed 22. When electrodes are immersed in water and electricity by four external forces is passed, then the bubbles formed on the negative as shown in the given terminal is figure. The force F A. Oxygen required to make the B. Hydrogen windmill stand still is C. Carbon dioxide A. 10 N D. Nitrogen B. 13 N 23. Arrange the following planets in increasing order of C. 15 N F time required to complete one rotation around Sun. D. 18 N (i) Earth (ii) Uranus 19. The given diagram (iii) Mars (iv) Jupiter shows water being heated Thermometer A. (i), (ii), (iii), (iv) in a tin can. A thermometer B. (i), (iii), (iv), (ii) hangs directly above it. C. (iv), (iii), (ii), (i) In which way, does the Tin can D. (ii), (iii), (i), (iv) Water thermal energy from the heat source reach the 24. Two persons P and Q are standing at a distance of thermometer? 100 m from a high wall as shown in the given figure. When P gives a clap, the time interval between the A. Radiation → Conduction → Radiation two (direct and reflected) sounds heard by Q is 0.2 s. B. Radiation → Conduction → Convection If the speed of sound is 340 m s–1, then the distance C. Radiation + Convection → Conduction → Radiation d between P and Q is D. Radiation + Convection → Conduction → A. 160 m Wall Radiation + Convection B. 260 m 20. A person X is facing a plane mirror which is 100 m fixed. While another person Y is running C. 290 m d towards person X from behind at a speed of D. 320 m P Q 2 m s–1 as shown in the given figure. How fast does person Y seem to be running towards person X in 25. The speed-time graphs for three vehicles X, Y and Z the mirror ? are shown. Speed (m s–1) Mirror If x, y and z are the A. 2 m s–1 distances travelled by 10 B. 3 m s–1 X 2 m s–1 X, Y and Z respectively 5 Z C. 4ms –1 X Y in 8 s, then which of the following comparisons Y D. 6 m s–1 0 8 Time (s) is correct ? 21. A positively charged oil drop is suspended in the air A. x > y = z by two charged plates as shown in the given figure. B. x > y > z What will happen to the oil drop if the positive charge C. x = y < z in it decreases? D. x < y < z –––––––––– 26. Which of the following objects experience balanced + forces? ++++++++++ A. A ball dropping vertically. A. The oil drop will move randomly. B. A car accelerating uniformly from rest. B. The oil drop will move upwards. C. A trolley moving at a constant velocity down an C. The oil drop will move downwards. inclined plane. D. The oil drop will remain stationary. D. A plane flying in a circle with constant speed. 17th NSO - SET B 5 27. Spoons of different materials are used to stir a hot 31. Read the given statements carefully. drink. Which of the following spoons will heat up P : I am the most common fire extinguisher but the fastest? not suitable for oil, petrol and electrical fires. I am A. Plastic spoon heavier than oil and also, conduct electricity. B. Steel spoon Q : I am an excellent fire extinguisher and most C. Glass spoon suitable for oil, petrol and electrical fires. I also, D. Wooden spoon form a blanket around the fire and bring down the temperature of the fuel. 28. When we remove polyester or woolen cloth in dark, Identify P and Q. we can see spark and hear a cracking sound. These P Q are due to ________. A. CO2 H2 O A. Static electricity B. H2O CO B. Current electricity C. O2 CO2 C. Movement of charges D. H2O CO2 D. None of these 32. Renuka, a science teacher performed the following 29. Observe the given experimental set-up and identify activity to prove that air is necessary for combustion. the gas ‘X’ and its characteristics. I II III She asked the students to observe the flame of lighted candles placed under the glass chimneys carefully. What were the correct observations. I. It is carbon dioxide. I II III II. It is sulphur dioxide. A. Flame finally Flame flickered Candle burnt III. It does not support combustion. went off and produced freely IV. It is acidic in nature. smoke A. II and IV B. Candle burnt Flame finally Flame flickered B. I, III and IV freely went off and produced C. I and III smoke D. II, III and IV C. Candle burnt Flame flickered Flame finally freely and produced went off 30. Namita categorised the different elements as shown smoke below : D. Flame finally Candle burnt Flame flickered went off freely and produced Characteristic Na Al S Fe Cu P smoke a. Metal ü ü  ü ü  33. Fill in the blanks. b. Hardness ü   ü ü  Raghav used excessive chemical fertilisers during c. Malleability  ü   ü ü farming which makes the soil (i) . He added (ii) to increase the production of crops. d. Ductility   ü ü ü  Rahul used excessive substances to neutralise the e. Conductor of ü ü  ü ü  factory wastes near his field. As a result, the soil electricity of his field became too (iii) which he treated Which of the characteristics is not correctly matched with (iv) . by Namita? (i) (ii) (iii) (iv) A. a, c and e A. Acidic Organic matter Basic Slaked lime B. a, b, d and e B. Basic Organic matter Acidic Slaked lime C. b, c and d C. Acidic Slaked lime Basic Organic matter D. All are correct D. Basic Slaked lime Acidic Organic matter 17th NSO - SET B 6 34. Identify Y and Z in the given Venn diagram. 38. Body temperature of some animals changes with that of atmosphere while some animals have adapted to Turns China rose maintain constant body temperatures. indicator green A d v i k a investigated Z Y this fact using three Body temperature X Bitter animals X, Y and Y Found in spinach in taste Z and obtained the Z given graph. Which of these options correctly Phenolphthalein remains identifies X, Y and Night Day Temperature colourless Z? Y Z X Y Z A. Oxalic acid Milk of magnesia A. Frog Lizard Rabbit B. Soap Tartaric acid B. Lizard Cobra Rabbit C. Window cleaner Ascorbic acid C. Salamander Crow Cow D. Milk of magnesia Oxalic acid D. Crow Bear Frog 35. Match the Column-I with Column-II and select the 39. Run-off pollution of a particular river resulted from correct option given below. overuse of chemical fertilizers by a nearby farm. Which of the following graphs correctly shows the Column-I Column-II a. Coal tar (i) Metalling the roads resulting changes in levels of oxygen and bacteria b. Petrol (ii) Manufacture of steel in this river? c. Coal gas (iii) Source of heat d. Bitumen (iv) Vaseline e. Coke (v) Naphthalene balls A. B. f. Paraffin wax (vi) Dry cleaning A. a-(v), b-(vi), c-(iii), d-(i), e-(ii), f-(iv) B. a-(i), b-(iv), c-(iii), d-(ii), e-(v), f-(vi) C. a-(iii), b-(v), c-(i), d-(iv), e-(ii), f-(vi) D. a-(iv), b-(i), c-(vi), d-(iii), e-(v), f-(ii) C. D. 36. Which of the following statements about the characteristics of organelles are correct? (i) Mitochondria contain their own DNA. 40. The given figure represents the (ii) Lysosomes contain many anabolic enzymes. location of various endocrine (iii) Secretory liver cells have abundant number of P glands in human body. RER. (iv) Ribosomes are always found attached to the Golgi Identify the glands marked as R apparatus. P, Q, R, S and T and select the Q A. (i) and (iii) B. (i) and (ii) incorrect statement regarding S T C. (i), (ii), (iii) and (iv) D. (i), (ii) and (iv) these. A. Gland P secretes the hormone thyroxine, which 37. Digestion of food involves breaking down of food regulates growth and metabolism. components into smaller molecules by enzymes. These enzymes are active only at certain hydrogen ion B. Gland Q secretes the hormones corticosteroids and concentrations. As a result, certain food combinations adrenaline, which regulate breathing, heart rate, can facilitate or retard the process of digestion. Of carbohydrate metabolism and mineral balance. the following combinations, one that can result in C. Glands S and T secrete the hormones which control very efficient digestion is ______. secondary sexual characters in females and males A. Meal with high proteins and acid fruits respectively. B. Meal with high starch and high proteins D. Gland R secretes the hormone insulin, whose C. Meal with high starch and acid fruits increased concentration leads to diabetes. D. Meal with high fat and high proteins 17th NSO - SET B 7 41. Read the given statements and select the correct 44. Tarun sets up a plant as shown in the figure. option. After a few days, he observed upward growth in the Statement 1 : H otspots are specific regions of roots of the plant. megabiodiversity nations with large number of endemic species. Statement 2 : Endemic species are often threatened due to the introduction of exotic species Soil X After Soil X from some other geographical area. few days A. Both statements 1 and 2 are true and statement 2 Soil Y Soil Y is the correct explanation of statement 1. Day 1 Day 7 B. Both statements 1 and 2 are true but statement 2 Based on his observations what can you conclude? is not the correct explanation of statement 1. A. Soil X is clayey while soil Y is loamy. C. Statement 1 is true and statement 2 is false. B. Soil X is sandy while soil Y is clayey. D. Statement 2 is true and statement 1 is false. C. Soil X is loamy while soil Y is sandy. 42. Select the incorrect statement from the following. D. It is not possible to tell. A. Synthetic fibres have little or no absorbency, 45. Read the given passage in which some words are although several of them do absorb oil. italicised. B. Wool fibre is harmed by acids including mild acids Agriculture has become more efficient with the advent like vinegar. of modern technology. Modern tractor driven ploughs C. Cellulose fibres continue to glow after they are are faster and better. Seed drills used today combine removed from the flame. 5-6 traditional seed drills. Thus, they are faster and D. Cotton fibres, linen and other cellulose fibres are ensure sowing seeds at proper depth of 20-25 cm. quiet heat resistant and can be boiled safely. Modern irrigation methods have also been developed which reduce water wastage. Drip irrigation is less 43. Refer to the given diagram Part X expensive method particularly useful for soils with which shows a cross section of the stem and select the Part Y low water retention capacity. Sprinklers are more correct option. suited for uneven lands and sandy soils. Some of these italicised words are put incorrectly. A. If we put a plant in red water for sometime, the Find out them and select the correct option. colour would then appear in the part X. B. On girdling, swelling occurs above the girdled A. Less expensive should not be replaced as it is part due to the discontinuity of part Y. correctly mentioned. C. Conduction of water and organic solutes occurs B. 20-25 cm should be replaced by 10-15 cm. through part Y. C. Low should be replaced by high. D. Conduction of products of photosynthesis occurs D. Uneven lands should be replaced by plain lands. through part X. Achievers Section Direction : (Q. No. 46 and 47) Refer the given passage 46. The range of the scale of the metre ruler that can and answer the following questions. be seen is A metre ruler is held 0 A. 10 cm to 40 cm B. 15 cm to 45 cm vertically in front of a C. 20 cm to 50 cm D. None of these 10 cm plane mirror of length 47. If the hole is at 80 cm mark of the scale, then the 15 cm as shown in the 5 cm range of the metre ruler that can be seen in the given figure. A student mirror is peeps through a hole at the 40 cm mark. A. 10 cm to 40 cm B. 20 cm to 50 cm 100 cm C. 30 cm to 60 cm D. None of these 17th NSO - SET B 8 48. Anuj has performed an D. The environmental factor studied in the graph P experiment to compare the Hook can be sugar concentration in medium and in graph strength of different fibres. Q can be pH. Threads of same He arranged the set-up as length and thickness 50. Refer the given key to identify the organisms P, Q, shown in figure : were taken R, S, T and U and select the correct option. Arrange the threads in Weights were put 1. (i) Somatic cells carry out propagation - Go to 2. order of their increasing one by one till the (ii) Germ cells carry out propagation - Go to 3. strength. thread broke 2. (i) Single cell division forms new organism A. Nylon < Silk < Cotton B. Silk < Cotton < Nylon - P C. Cotton < Nylon < Silk (ii) Multiple cell divisions occur - Go to 4. D. Cotton < Silk < Nylon 3. (i) Fertilization occurs outside parent's body 49. Swati was studying growth of yeast under different - Q conditions of environment. She plotted two graphs (ii) Fertilization occurs inside parent's body - Go but forgot to label the X axes of the graphs. Analyse to 5. the given graphs and select the correct option. 4. (i) Each cell produced after division produces Y Y new organism - R No. of yeast cells No. of yeast cells (ii) All the cells together form a new organism - S 5. (i) Embryonic development occurs outside parent's X X body - T P Q (ii) Embryonic development occurs inside parent's A. The environmental factor studied in graph P can body - U be pH and in graph Q can be temperature. B. The environmental factor studied in graph P A. P can be yeast, Q can be chamaeleon. can be temperature and in graph Q can be sugar B. R can be Plasmodium, S can be Hydra. concentration in medium. C. T can be duck-billed platypus, U can be ostrich. C. The environmental factor studied in graph P can D. P can be yeast, U can be spiny ant eater. be temperature and in graph Q can be pH. SPACE FOR ROUGH WORK Class 8 18th Set 1 Year 2015  logical reasoning 1. How many such symbols are there in the given 6. Find the missing number, if a certain rule is followed arrangement each of which is immediately preceded row-wise or column-wise in the given matrix. by a number and immediately followed by a letter? 3 ? 5 A. 4 58#BFL?4*M79GH2M3+84?$PQ 5 4 7 6R7*HT B. 6 4 4 6 C. 9 A. 2 B. 3 36 32 114 C. 4 D. 5 D. 8 2. Three different positions of a dice are shown here. 7. Select the correct water image of the given Fig. (X). Which symbol will be on the face opposite to the face with symbol * ? × A.  Δ A J B. Δ – * + + Fig. (X) * © C. © J A J A D. + A. × B. × 3. Read the following information carefully. (i) A # B means B is at 1 metre to the right of A. A J A J (ii) A $ B means B is at 1 metre to the North of A. C. × D. + (iii) A * B means B is at 1 metre to the left of A. If M is facing towards North, according to M # N $ O * P, in which direction is P with respect 8. There is a certain relationship between figures (i) and to M? (ii). Establish the similar relationship between figures A. East B. West (iii) and (iv) by selecting a suitable figure from the C. North D. South options which will replace the (?) in figure (iv). 4. Which of the following Venn diagrams best depicts U S T the relationship amongst "Teachers, Men, Players"? ? S P P S (i) (ii) (iii) (iv) A. B. S S A. B. G C. D. S S C. D. 5. In which of the following options, Fig. (X) is exactly 9. Select a figure from the options which will continue the embedded as one of its part? same series as established by the Problem Figures. Problem Figures + = Fig. (X) + + ? = = + = + = A. B. + + A. B. = = C. D. + C. = D. = + 2 | 18th NSO | Class-8 | Set-1 | Level 1 10. If P + Q means 'P is the brother of Q', P × Q means A. A÷B×C+D 'P is the wife of Q' and P ÷ Q means 'P is the daughter B. A×B+C÷D of Q', then which of the following means 'A is the C. A+C÷B×D niece of D'? D. A÷C+B÷D Science 11. The speed of sound in different media is different. P Q R S Which of the following options is correct regarding the speed of sound in different media? A. Big Little Pole star Cassiopeia dipper dipper A. Oxygen < Mud < Water B. Ice < Stone < Alcohol B. Little Big Cassiopeia Pole star C. Fruit juice < Iron < Air dipper dipper D. Steam < Kerosene < Mercury C. Cassiopeia Pole star Big dipper Small dipper 12. A cube of side a rests on the floor as shown in the D. Little Big Pole star Cassiopeia given figure. Given that the pressure exerted by this dipper dipper cube on the floor is P, what is the pressure exerted by another cube of the same material of side 4a ? –1 (Take g = 10 N kg ) 16. The diagram shows a soft iron core coiled with A. P wire. B. 2P Soft iron core C. 4P S D. 16P a 4a Coil 13. The given diagram shows a brick wall in between a man and a camp fire. How does thermal energy from the camp fire reach the man? Nail When the switch is turned on, iron nails are attracted.  Which of the following ways will make the soft iron core to attract all the iron nails? A. Decrease the number of cells A. Radiation → Convection → Conduction B. Increase the number of turns in coil B. Conduction → Conduction → Convection C. Place the soft iron core outside the coil C. Radiation → Conduction → Convection D. None of these D. Radiation → Conduction → Radiation 17. A car is accelerating on a road in the direction shown 14. United Football Club is playing an evening match. in the figure. The tyre shown is connected to the The team’s jersey has blue and white stripes. What engine. In which direction is the force of friction colour would the stripes appear under floodlights exerted by the road on the tyre? which produce a yellow light? A. Black and yellow B. Blue and white Tyre C. Blue and yellow D. Black and white Direction of motion P 15. The given diagram shows the night sky in which stars Q S are visible. Identify P, Q, R and S. Road P R A. P R B. Q C. R Q S D. S 18th NSO | Class-8 | Set-1 | Level 1 | 3 18. Read the given statements and select the correct B. Covering the wire with plastic insulation. option. C. Using a shorter wire of the same material and Statement 1 : The size of a hydrogen balloon increases same thickness. as it rises in air. D. Using a thicker wire of the same material and Statement 2 : The material from which the balloon same length. is made can be easily stretched. 23. Metals are good conductors because A. Both statements 1 and 2 are true and statement 2 A. Outer electrons are strongly bound to the atom is the correct explanation of statement 1. B. Outer electrons are loosely bound to the atom B. Both statements 1 and 2 are true but statement 2 C. Inner electrons are loosely bound to the atom is not the correct explanation of statement 1. D. Protons can detach from the nucleus and conduct C. Statement 1 is true and statement 2 is false. electricity. D. Both statements 1 and 2 are false. 24. Figure gives the speed-time graph of the motion of a 19. Anju walks 8 m to the east, then 6 m to the south, car. What is the ratio of the distance travelled by the then 8 m to the west and finally 6 m to the north. car during the last two seconds to the total distance What is the distance covered and displacement of travelled in seven seconds? Anju? A. 1:9 Distance travelled Displacement A. 0 m 0m B. 2 : 9 B. 0 m 28 m C. 28 m 0m C. 1:3 D. 28 m 28 m D. 4:9 20. Deepak put twenty ice cubes of the same volume into four containers packed with different materials. He 25. Match the column I with column II and select the recorded the time taken for the ice to melt in each correct option from the given codes. case. The table shows his results. Which of the boxes Column I Column II should he choose to carry ice that he needs to take (a) Jupiter (i) Seven rings to a friend’s house 120 km away? (b) Saturn (ii) Red planet A. Container with Melting time : 3 h 10 min (c) Mars (iii) Morning star thermocol (d) Neptune (iv) Great red spot B. Container with ice Melting time : 2 h 05 min (e) Venus (v) Fourteen moons paper A. (a) – (iv), (b) – (i), (c) – (v), (d) – (iii), (e) – (ii) C. Container with Melting time : 30 min B. (a) – (i), (b) – (ii), (c) – (iii), (d) – (iv), (e) – (v) sand C. (a) – (v), (b) – (iv), (c) – (iii), (d) – (ii), (e) – (i) D. Container with Melting time : 1 h 15 min D. (a) – (iv), (b) – (i), (c) – (ii), (d) – (v), (e) – (iii) sawdust 26. Each beaker shown in the given options, contains two 21. A positively charged object attracts a suspended light same sized strips of different metals fastened together conducting ball. The light conducting ball can be and immersed in hydrochloric acid. After 5 minutes, which beaker will contain the least amount of zinc (i) negatively charged ions? (ii) positively charged (iii) neutral A. (i) only B. (ii) only A. B. C. (ii) and (iii) only D. (i) and (iii) only Magnesium Zinc Lead Zinc 22. The terminals of a battery are joined by a length of resistance wire. Which change, on its own will decrease the current through the battery? C. D. A. Connecting an identical wire in series with the first one. Iron Zinc Silver Zinc 4 | 18th NSO | Class-8 | Set-1 | Level 1 27. Three unknown solutions are taken in test tubes. 31. Plants do not grow well when the soil is either too Different indicators are added to these solutions to acidic or too basic. What should be added to the soil test their nature. if it is too acidic? A. Lemon juice B. Vinegar Phenolphthalein Methyl orange China rose indicator C. Quick lime D. Organic matter Solution ‘X’ Solution ‘Y’ Solution ‘Z’ 32. Fill in the blanks by choosing an appropriate (1) (2) (3) option. (Turns pink) (Turns red) (No colour change) I are used in the manufacture of detergents, fibres, Identify the substances X, Y and Z. polythene and other man-made plastics. II obtained X Y Z from natural gas, is used in the production of fertilisers A. Soap solution Lime water Grape juice (urea). Petroleum is also called ____ III__ due to its great commercial importance. B. Milk of Lemon juice Slaked lime I II III magnesia A. Fossil fuels Petroleum gas Black gold C. Salt solution Tamarind juice Calamine solution B. Petrochemicals Coal gas Diesel D. Antacid Sour milk Glucose solution C. Petrochemicals Hydrogen gas Black gold D. Coal products CNG Paraffin wax 28. Read the given statements about synthetic fibres and plastics carefully. 33. Mrs. Usha, a science teacher performed the following experiments : I. Polycot is a mixture of two types of fibres, polyester and cotton. Experiment 1 : She heated sugar in a China dish. A black II. Calendar, woollen clothes and cold drink cans are substance was obtained along with caramel fumes. all non-biodegradable. Experiment 2 : She mixed sand and crushed naphthalene III. Uniforms of firemen have coating of nylon to balls in a China dish. Then she covered the China dish make them flame resistant. with a watch glass with some ice kept on it and heated. Crystals of pure naphthalene were seen on the underside IV. Polythene and PVC are the examples of of the watch glass. thermosetting plastics. Identify the changes taking place in these experiments. Which of these statements is/are incorrect? A. Experiment 1 - Chemical change, Crystallisation A. II and IV B. I and III Experiment 2 - Physical change, Decomposition C. Only II D. II, III and IV B. Experiment 1 - Physical change, Crystallisation 29. Match the column I with column II and select the Experiment 2 - Chemical change, Sublimation correct option from the given codes. C. Experiment 1 - Physical change, Crystallisation Column I Column II Experiment 2 - Physical change, Crystallisation P. Dark zone of flame (i) Rapid combustion D. Experiment 1 - Chemical change, Decomposition Q. Source of heat and (ii) Incomplete Experiment 2 - Physical change, Sublimation and light in sun combustion Crystallisation R. Burning of LPG gas (iii) Spontaneous 34. Read the following statements and select the option combustion which correctly fills any three blanks. S. Luminous zone (iv) Nuclear reactions T. Burning of (v) No combustion (i) In (a) irrigation emitters let out trickling water phosphorus in air at near the roots. room temperature (ii) Removing the chaff from the grain is called (b) , while separation of the grain from the P Q R S T crop is called (c) . A. (v) (iv) (i) (ii) (iii) (iii) The organic substance obtained from dead plants B. (ii) (iv) (i) (v) (iii) and animal wastes is (d) . C. (v) (iv) (iii) (ii) (i) D. (ii) (iii) (iv) (v) (i) (iv) Wheat and gram are rabi crops, while maize and (e) are kharif crops. 30. Solution of which of the following oxides in water A. (b) – Winnowing, (d) – Manure, (e) – Oats will change the colour of red litmus to blue? B. (b) – Winnowing, (c) – Threshing, (e) – Cotton A. Carbon dioxide B. Copper oxide C. (a) – Drip, (d) – Fertilizer, (e) – Mustard C. Phosphorus trioxide D. Sulphur dioxide D. (a) – Sprinkler, (b) – Threshing, (c) – Winnowing 18th NSO | Class-8 | Set-1 | Level 1 | 5 35. Refer to the given diagram of nitrogen cycle. (ii) Plant cell has cell wall made up of cellulose which Ammonia is very strong material and prevents the cell from bursting. T (iii) The plant cell contains vacuole and therefore can Death P absorb more water. N2 cycle Bacterial (iv) The animal cell does not possess vacuole. S oxidation Q Which of the above given conclusions are correct? R A. (i) and (ii) B. (iii) and (iv) Match the letter from the above diagram with the C. (i), (ii) and (iii) D. All of these processes/substances given below and select the correct option. 39. Select the incorrect statement regarding the given (a) Animal protein (b) Nitrate ion figure. (c) Plant protein (d) Nitrite ion (e) Dead organic matter S P Q R S T A. (b) (d) (c) (a) (e) B. (b) (d) (a) (c) (e) R C. (d) (b) (a) (c) (e) Q D. (d) (b) (c) (a) (e) P T 36. Red Data Book keeps the record of _______. A. The part labelled P produces both male gametes A. Endangered animals and plants and androgen. B. Endemic animals and plants C. Extinct animals and plants B. The sperms collect and mature in Q. D. Both A and C C. The parts R and S have no role in reproduction. D. The part T is located outside the abdominal cavity 37. Study the given flow chart. and protects P and Q inside it. Biosphere Reserve Parts 40. Study the given Venn diagram. X is likely to be _______. X Y Z Noise Pollution Strongly Provides Provides space protected space for for forestry, for the X environmental agriculture Water conservation research and Pollution of biological and tourism Land Pollution diversity education Air Pollution A. A group of people smoking cigarettes Which of the following is suitable heading for X, Y and Z? B. Youngsters dancing in a disco X Y Z C. A farmer spraying pesticides near a river A. Core zone Manipulation Buffer zone D. Construction work going on at a building site zone B. Buffer zone Core zone Manipulation 41. Which of the following organisms has been incorrectly zone described? C. Manipulation Buffer zone Core zone Organism Adaptation Habitat zone A. Fennec Has large ears to increase Desert D. Core zone Buffer zone Manipulation fox exposed area to lose heat zone quickly 38. Natasha put a plant cell and an animal cell of similar B. Morning Has twining stems to climb Forest size in two similar dishes containing the same amount glory up around a support of water overnight. The next day, she observed the C. Owl Has talons to grip prey Forest cells under the microscope and noticed that the animal tightly cell has burst and the plant cell looked more bloated. D. Walrus Has blowholes on the top of Ocean She drew the following conclusions: the body to allow breathing (i) The animal cell has only a thin layer of cell of atmospheric air while membrane. When too much water enters it, it the rest of the body is bursts. under water 6 | 18th NSO | Class-8 | Set-1 | Level 1 42. Study the given flow chart. 44. Unscramble the given words and select the option Food enters Food is Food moves that gives name of the process of washing wool with mouth chewed down the gullet soap water to remove dirt and greese. A. NSERHAIG Complete digestion of Substance P kills bacteria food and absorption of present in food and helps B. DCNRIAG Q occurs in digestion C. GTRNSOI D. GURSOCNI Movement of waste for storage in rectum 45. Refer to the given figure showing cross-section of a and extraction of substance R flower and select the correct option to fill the blanks in the following paragraph. What are P, Q and R respectively? P Q R P A. Saliva Nutrients Hydrochloric S acid B. Saliva Water Waste T Q R C. Hydrochloric acid Nutrients Water D. Bile Water Waste 43. Transpiration is the loss of water from the surface of a plant. Which of the following statements describes Fertilization takes place when pollen grains from the why this process is useful for plants? male part, (i) reach the part of the flower labelled A. It cools down plants, preventing overheating on (ii) . The (iii) increases in size and becomes the sunny days. fruit, while (iv) becomes the seeds. B. It helps the plant to get rid of excess water, (i) (ii) (iii) (iv) protecting plant cells from bursting. A. P R Q R C. It enables the mass flow of inorganic nutrients and B. T Q Q R water up the plant body. C. S Q R Q D. Both A and C D. S R Q R Achievers section Direction : Refer to the given passage and answer questions C. The image becomes smaller and it appears 46 and 47. inverted. We can see an image not only on a plane surface, but also D. The image becomes smaller and it appears on a curved one. For example we can see our image on a upright. steel spoon. The image formed at the outer surface of a spoon is upright and the image formed at the inner surface 48. Refer to the given figures of bacteria X, Y and Z and read the statements (i), (ii), (iii) and (iv) regarding of the spoon is smaller and inverted. them. 46. The outer surface of the spoon which is bulging out acts like a ________ and inner side of spoon acts like a ________. A. Concave mirror, convex mirror X Y Z B. Convex mirror, concave mirror (i) Bacterium X can be causal organism of typhoid. C. Plane mirror, convex lens (ii) Bacterium Y can cause a disease which disrupts D. Concave lens, concave mirror proper exchange of gases. (iii) Bacterium Z can convert lactose sugar of milk into 47. If we move the spoon (inner surface) slowly away lactic acid. from our face, how does the image change? (iv) Bacterium X can be the causal organism of A. The image becomes bigger and it appears cholera. upright. Which of these statements are incorrect? B. The image becomes bigger and it appears A. (i) only B. (i) and (ii) only inverted. C. (ii), (iii) and (iv) only D. (i), (ii), (iii) and (iv) 18th NSO | Class-8 | Set-1 | Level 1 | 7 49. A copper vessel exposed to moist air for a long time 1, 2, 3 and 4 are respectively is shown in figure  I and sulphur powder is burnt in A. CuO, CO2, SO2, H2SO3 oxygen as shown in figure II. B. CuCO3, Cu(OH)2, H2SO3, SO2 C. Cu, CuO, H2S, H2SO4 D. Cu(OH)2, CuCO3, SO2, H2SO3 50. Diabetics who are on rapid-acting insulin are advised not to wait more than 15 minutes to eat after taking an insulin shot. Which of the following best explains this? A. Insulin is required for the proper absorption of nutrients in the small intestine. B. The insulin injection may prevent the body from absorbing the glucose necessary to maintain blood glucose concentrations. C. The injection of insulin can lead to dangerously low blood glucose concentration. D. The insulin injection can lead to dangerously low blood calcium concentration. SPACE FOR ROUGH WORK 8 | 18th NSO | Class-8 | Set-1 | Level 1 Class 8 18th Set 2 Year 2015  logical reasoning 1. If it is possible to make a meaningful word with the 8 7 st th th st 10 1 , 12 , 15 and 21 letters of the given arrangement, 6 13 then which will be first letter of the word so formed? 12 If no such word can be formed, give X as the answer 4 and if more than one such word can be formed, give 9 14 11 P as the answer. 5 ESGBDLUNKHWACZTVXFIJMO QYPR Which of the following represents a man who is urban as well as government employee but not educated ? A. M B. T C. X D. P A. 7 B. 13 C. 10 D. 6 2. Two positions of a dice are shown below. How many dots will be on the top when 2 dots are at the 7. Select the correct mirror image of the given bottom? combination of letters & numbers, if the mirror is A. 6 placed vertically to the left. B. 5 L5OGI32CAL A. B. LAC23IGO5L L5OGI32CAL C. 1 L5OGI32CAL D. 4 C. D. 3. Which of the following figures will continue the series 8. Persons X, Y, Z and Q live in red, green, yellow or as established by the Problem Figures? blue coloured houses placed in sequence on a street. Z Problem Figures lives in a yellow house. The green house is adjacent to the blue house. X does not live adjacent to Z. The ? yellow house is in between the green and red houses. The colour of the house X lives in is ______. A. Blue B. Green A. B. C. Red D. Data inadequate 9. In which of the following figures, Fig. (X) is exactly embedded as one of its part? C. D. Fig. (X) A. B.  4. If '+' is called '×', '–' is called '÷', '×' is called '–' and '÷' is called '+', then the value of C. D. 16 ÷ 64 – 8 × 4 + 2 is _____. A. 12 B. 16 C. 18 D. 24 10. There is a certain relationship between fig. (i) 5. Study the following information carefully: and (ii). Establish the similar relationship between fig. (iii) and (iv) by selecting a suitable figure from (i) B5D means B is the father of D. the options that will replace the (?) in fig. (iv). (ii) B9D means B is the sister of D. (iii) B4D means B is the brother of D. ? (iv) B3D means B is the wife of D. Which of the following means F is the mother of (i) (ii) (iii) (iv) K? A. F3M5K B. F5M3K A. B. C. F9M4N3K D. F3M5N3K 6. In the given diagram, rectangle represents men, triangle represents educated, circle represents urban C. D. and square represents government employees. 2 | 18th NSO | Class-8 | Set-2 | Level 1  Science 11. Read the given statements and select the correct 15. Match the column I with column II and select the option. correct option from the given codes. Statement 1 : Sound travels faster on a rainy day Column I Column II than on a dry day. (a) Limiting friction (i) Self adjusting force Statement 2 : Moisture increases the pressure. (b) Static friction (ii) Less than sliding friction A. Both statements 1 and 2 are true and statement 2 (c) Dynamic friction (iii) Maximum value of is the correct explanation of statement 1. static friction B. Both statements 1 and 2 are true but statement 2 (d) Rolling friction (iv) Less than limiting friction is not the correct explanation of statement 1. A. (a) – (ii), (b) – (i), (c) – (iv), (d) – (iii) C. Statement 1 is true and statement 2 is false. B. (a) – (iii), (b) – (i), (c) – (ii), (d) – (iv) C. (a) – (iv), (b) – (ii), (c) – (i), (d) – (iii) D. Both statements 1 and 2 are false. D. (a) – (iii), (b) – (i), (c) – (iv), (d) – (ii) 12. A student has a large tank of water in which he wants –2 16. A floor has a maximum loading capacity of 5 kN m . to set up a convection current. Which of the following Which of the following is allowed on this floor? actions will help him to do it? (Take g = 10 N kg–1) A. Cooling at Q Q R A. An elephant weighing 50 kN stands on 4 legs with B. Cooling at R Water each foot covering 400 cm2 of the floor. C. Heating at P B. A 50 kg lady wears a pair of high heel shoes, each D. All of these P 2 shoe has a contact area of 9 cm with the floor. C. A 100 kg washing machine stands on a surface 13. A narrow beam of white light is passed through a 2 area of 6500 cm . glass prism as shown in the figure. D. A designer’s table weighing 1000 N stands on Narrow beam 2 of 3 legs, each leg has a contact area of 0.1 cm P white light with the floor. Q Glass prism R Screen 17. The diagram shows the melting and boiling points of four different substances. Which substance is in solid state at 0°C and liquid state at 1400°C ? Which of the following is the correct order of colours Melting point Boiling point Temperature(°C) emerging from the prism? P Q R 0 200 400 600 800 1000 1200 1400 1600 1800 A. Red Blue Green 1 B. Red Green Blue 2 C. Blue Green Red 3 D. Blue Red Green 4 14. The diagram shows a method to magnetise an iron A. 1 B. 2 nail. In which diagram will the iron nail become an C. 3 D. 4 induced magnet? 18. A vessel contains two plane mirrors at right angles to each other as shown here. If the vessel is filled with water, then the total deviation in the ray incident A. B. normally is A. 0° B. 45° C. N S D. C. 90° 90° Iron bar D. 180° 18th NSO | Class-8 | Set-2 | Level 1 | 3 19. Which of the following options is true regarding the 24. Which of the following statements are true? number of moons of the given planets? (i) Beautiful patterns formed in a kaleidoscope is due A. Mars < Earth < Uranus < Neptune < Jupiter to irregular reflections. B. Earth < Mars < Jupiter < Uranus < Neptune (ii) Two plane mirrors when placed parallel to each C. Earth < Mars < Neptune < Uranus < Jupiter other give infinite number of images. D. Jupiter < Earth < Mars < Neptune < Uranus (iii) Real image is always inverted. (iv) Virtual image can be taken on a screen. 20. An iron block of dimensions 5 cm × 10 cm × 15 cm A. (i) and (ii) B. (ii) and (iii) has to be pushed along the floor. The force required C. (iii) and (iv) D. (i) and (iv) will be minimum when the surface in contact with ground is 25. The second's hand of a watch is 2 cm long. The speed A. (10 cm × 15 cm) surface of the tip of second's hand is B. (5 cm × 15 cm) surface A. 0.21 cm s –1 B. 2.1 cm s–1 C. (10 cm × 5 cm) surface C. 21 cm s–1 D. 0.021 cm s–1 D. Force is same for all surfaces. 26. Rohit has performed an activity to test whether the 21. The given diagram shows the night sky in which stars following materials conduct electricity or not by are visible. Identify the star X, and the constellation putting them in the circuit, one at a time as shown Y from the figure. in the figure. X Y A. Orion Cassiopeia B. Sirius Orion C. Pole star Sirius X Y D. Pole star Orion 22. For the velocity-time graph Velocity (m s–1) 10 shown here, the distance 8 covered by the body in last 6 two seconds of its motion 4 is what fraction of the total 2 distance covered by it in Materials X and Y could be 0 1 2 3 4 5 6 six seconds? Time (s) X Y 1 1 A. 1, 3, 4, 6 2, 5 A. B. 2 4 B. 1, 5, 6 2, 3, 4 1 2 C. 1, 3, 6 2, 4, 5 C. D. 3 3 D. 2, 3, 4, 5 1, 6 23. Two identical neutral light conducting balls suspended 27. Fill in the blanks by choosing an appropriate by insulating threads touch each other as shown. option. Each cell in our body contains an acid, the (i) . It controls every feature of the body such as our looks, colour of our eyes, our height, etc. Proteins that build part of our cells are also made of (ii) . The fats in Which of the following shows the positions of balls our body contain (iii) . when a heavy positively charged sphere is placed near them? (i), (ii) and (iii) respectively are A. Amino acids, deoxyribonucleic acid, fatty acids B. Deoxyribonucleic acid, fatty acids, amino acids A. B. C. Deoxyribonucleic acid, amino acids, fatty acids D. Fatty acids, deoxyribonucleic acid, amino acids. 28. Find the incorrect match. A. Haemoglobin – Magnesium C. D. B. Fertilisers – Nitrogen and phosphorus C. Chlorophyll – Iron D. Both A and C 4 | 18th NSO | Class-8 | Set-2 | Level 1 29. Read the given statements and select the correct 33. Water is not a suitable fire extinguisher to douse the option. fires involving oil and petrol because Statement 1 : Bakelite is used for making electrical A. Water may conduct electricity switches and handles of various utensils. B. Water is heavier than oil Statement 2 : Bakelite is a good conductor of heat and C. Water cannot be stored at high pressure in electricity. cylinders A. Both statements 1 and 2 are true and statement 2 D. Water is lighter than oil. is the correct explanation of statement 1. B. Both statements 1 and 2 are true but statement 2 34. X, Y and Z are three methods of weeding. X can be is not the correct explanation of statement 1. done by ploughing, harrowing etc. Y involves the use C. Statement 1 is true and statement 2 is false. of chemicals whereas Z employs biological agents to control weeds. D. Both statements 1 and 2 are false. Identify X, Y and Z and select the correct option 30. Select the incorrect statements among the following. regarding this. (i) Bitumen is used for metalling the roads. A. In small fields, X method involves the use of trowel (ii) Some inexhaustible natural resources like coal, or hoe which is time consuming and involves a petroleum and natural gas formed from the dead lot of labour. remains of living organisms are known as fossil B. Y method involves the use of poisonous chemicals fuels. like metachlor which kill the weeds and may affect the health of farmers and all the consumers. (iii) Many useful substances are obtained from coal C. Z method is a safer method to kill weeds as it so, it is also called ‘Black gold’. employs insects which feed on weeds thereby (iv) Natural gas is used as a starting material for checking their growth and has no side effects on the manufacture of a number of chemicals and the crop plant and its consumers. fertilisers. D. All of these A. (i) and (ii) B. (ii) and (iii) C. (ii) and (iv) D. (i), (ii) and (iv) 35. Which of the following statements is incorrect regarding Biosphere Reserve? 31. Match the column I with column II and select the A. Biosphere Reserves are multipurpose protected correct option from the given codes. areas meant for conserving genetic diversity, Column I Column II ecosystems and landscapes without uprooting the P. Zinc carbonate (i) turns methyl orange red local people. Q. Citric acid (ii) treats acidic soil B. Each Biosphere Reserve supports education and R. Slaked lime (iii) potassium hydroxide research in various ecological aspects of the S. Soap (iv) remedy for ant's bite ecosystem. P Q R S C. Ample human activities like cultivation, recreation, A. (i) (iii) (iv) (ii) forestry etc., are allowed in the core zone of a B. (ii) (iv) (iii) (i) Biosphere Reserve. C. (iv) (i) (ii) (iii) D. A Biosphere Reserve may include other protected areas such as National Parks. D. (iii) (ii) (iv) (i) 36. The given picture shows a set-up at the start of an 32. Observe the given Venn diagram carefully. experiment, X and after a few days, Y. The change observed in set up Y is due to Swollen Stem tissue 1 – Extraction of metal from its oxide using electricity with phloem removed 2 – Burning of a candle 3 – Sublimation of naphthalene balls X and Y respectively are X Y A. Physical and chemical changes A. Upward movement of food getting blocked B. Chemical and physical changes B. Downward movement of food getting blocked C. Both chemical changes C. Upward movement of water getting blocked D. Both physical changes. D. Downward movement of water getting blocked. 18th NSO | Class-8 | Set-2 | Level 1 | 5 37. Use the given dichotomous key and select the correct C. The scarlet king snake looks very much like the option. poisonous coral snake. I. (a) They are mostly single-celled organisms. - Go D. A treehopper on a leaf or twig resembles a thorn. to II (a) (b) They are classified on the basis of shape. - Go 41. Study the given flow chart and identify P, Q and R. to II (b) and III (b) II. (a) They live together in colonies of millions. - Go to III(a) Pollutants (b) The rod shaped are called P . which can be Yes P III. (a) They reside in our intestine and help in the decomposed by process of digestion. - Q microbes (b) The comma-shaped and spherical are respectively called R and S . No P Q R S A. Spirillum Amoeba Coccus Vibrio Can be Yes B. Vibrio Streptococcus Spirillum Coccus recycled Q C. Bacillus Plasmodium Coccus Vibrio D. Bacillus E.coli Vibrio Coccus No 38. Refer to the given figure and select R the incorrect statement(s). P P Q R (i) The part labelled P is found A. Livestock Styrofoam DDT in plant cell only. R wastes cup (ii) The part labelled Q is cell Q B. Garbage BHC Aluminium wall, which provides rigidity cans to a plant cell. C. Sewage DDT Styrofoam (iii) The part labelled R is the sludge cup controlling centre. D. Livestock BHC Grocery (iv) The part labelled R gets its shape from part labelled wastes P. A. (iv) only B. (i) and (iv) only 42. Rahul conducted an experiment as shown here. C. (ii) and (iii) only D. (iii) only Sunlight 39. Refer to the given diagram with its parts labelled as Bubbles of gas P, Q, R and S. Which of the following statements is incorrect regarding this? Inverted test tube Q Beaker Inverted funnel P R Water containing NaHCO3 S A. In Q, the sperm and ovum fuse to form zygote. Support to keep funnel off bottom B. Development of foetus takes place in S. Hydrilla plant C. R is the site of implantation of embryo. Which of the following statements is correct regarding this? D. One of the functions of P is to control secondary sexual characters. A. Hydrilla plant cannot photosynthesise as CO2 is not available to the plant. 40. Which of these is a behavioural adaptation? B. NaHCO3 present in the water absorbs all CO2 A. A hognose snake pretends as dead to trick the dissolved in it. predator. C. Sunlight cannot reach the plant properly and hence B. A frog’s light-coloured belly makes it harder for photosynthetic rate of the plant is affected. a predatory fish to see it against sunlight on the D. The bubbles produced in the water within test-tube water surface. are mainly of oxygen gas. 6 | 18th NSO | Class-8 | Set-2 | Level 1 43. Read the given paragraph. P Q R S T The female silk moth lays hundreds of tiny eggs at a A. a, 3 b, 2 b, 1 b, 4 b, 3 time. The eggs are cooled to a suitable temperature B. b, 3 a, 1 a, 2 b, 3 b, 4 to hatch. The tiny silkworms or caterpillars are kept C. b, 4 a, 2 a, 1 a, 3 a, 4 in clean bamboo trays along with neem leaves. The D. a, 2 b, 1 b, 3 b, 2 b, 4 caterpillars feed continuously and undergo moulting nine times. Then they stop eating and are ready to 45. Rita set up an experiment as shown here. enter pupal stage. They spin cocoon around themselves Soda lime which takes around eight days. to absorb CO2 Test-tube Capillary tube Some of the words have been italicised. Select the correct option regarding them. A. Cooled should not be replaced as it is correctly mentioned. Germinating seeds Drop of uid B. Neem should be replaced by pomegranate. What will happen to the drop of fluid in the capillary C. Nine should be replaced by four. tube over the next few hours? D. Eight should be replaced by twenty. A. It will move away from the test tube because of 44. Match column I with column II and column III and oxygen output by the seeds. select the correct option from the given codes. B. It will move towards the test tube because of Column I Column II Column III carbon dioxide intake by the seeds. P. Salamander a. Asexual 1. Budding C. It will move towards the test tube because of Q. Yeast reproduction 2. Fission oxygen intake by the seeds. R. Paramecium b. Sexual 3. Ovipary D. It will not move, because carbon dioxide intake S. Platypus reproduction 4. Vivipary and oxygen output are equal. T. Flying fox Achievers section Direction: Refer to the given passage and answer the A. Sulphate, Copper following questions 46 and 47. B. Copper, Sulphide The given figure shows the electroplating of copper over C. Copper, Sulphate a flower vase made of iron. It is done by the process of D. Sulphate, Sulphide electrolysis. Battery 48. Read the given statements each with one or two blanks in it. + P. (i) allows water, minerals and some other necessary substances to move across cell. Y Q. The liquid in the nucleus is called (ii) in Copper rod which are suspended thread-like structures called X Flower vase (iii) . Copper sulphate R. (iv) are called powerhouse of cell whereas solution (Z) (v) are called kitchens of cell. 46. Identify X, Y and Z from the figure. S. (vi) help to destroy old cell structures and (vii) take part in protein synthesis. X Y Z Select the option which correctly fills some of the A. Anode Cathode Electrolyte blanks in these statements. B. Cathode Anode Electrolyte A. (i)-Cell wall, (ii)-Genes, (v)-Centrosome C. Electrolyte Cathode Anode B. (ii)-Nucleoplasm, (iv)-Mitochondria, D. Cathode Electrolyte Anode (vi)-Lysosomes 47. During electrolysis, positively charged _______ ions C. (iii)-Plastids, (vi)-Lysosomes, (vii)-Ribosomes move towards flower vase and negatively charged D. (v)-Chloroplasts, (vi)-Centrosome, _______ ions move towards copper rod. (vii)-Endoplasmic reticulum 18th NSO | Class-8 | Set-2 | Level 1 | 7 49. Each of the given beakers contains two metal strips 50. The given graph shows changes in levels of two of same size fastened together and immersed in factors X and Y present in a river due to run-off hydrochloric acid. pollution. Levels Y X Time Run-off pollution After 5 minutes, amount of Q ions formed is greater Which of the following statements is correct regarding than P ions in beaker  1, S ions is greater than R ions this? in beaker 2, R ions is greater than Q ions in beaker 3, A. X could be an aquatic plant population whereas Y and T ions is greater than S ions in beaker 4. could be a fish population. Correct order of reactivity of these metals is B. X could be dissolved oxygen in river whereas Y A. P > Q > R > S > T could be a bacterial population. B. R < P < T < S < Q C. X could be dissolved oxygen in river whereas Y C. T > R > Q > P > S could be a fish population. D. P < Q < R < S < T D. X could be a bacterial population whereas Y could be an aquatic plant population. SPACE FOR ROUGH WORK 8 | 18th NSO | Class-8 | Set-2 | Level 1 Class 8 19th Set A Year 2016  logical reasoning 1. If each vowel in the word MOUNTAIN is replaced 5. In which of the following options, Fig. (X) is exactly by the next letter in the English alphabet and each embedded as one of its part ? consonant is replaced by the previous letter in the English alphabet, then which of the following will be the fourth letter to the left of seventh letter from the Fig. (X) left end? A. T B. V A. B. C. N D. P 2. Select a figure from the options which will continue the same series as established by the Problem Figures. C. D. Problem Figures 6. Select the option in which specified components of the Fig. (X) are found? A. B. Fig. (X) C. D. A. B. 3. Study the following arrangement carefully and answer the question given below. C. D. BA5D%RI* F H 6 #V9 $ 3 E 7 G 1 ÷ 2 M K X8UFWZN 7. Find the missing number, if a certain rule is followed What should come in place of the (?) in the following row-wise or column-wise. series based on the above arrangement ? A. 15 3 15 4 ADI F69 37÷ ? B. 18 7 38 5 A. 2KU B. MXU C. 19 C. MXF D. XUM D. 20 3 ? 5 4. Two rows of numbers are given. The resultant number 8. Which of the following options most closely resembles in each row is to be worked out separately based on the the water image of given combination of letters and following rules. The operations on numbers progress numbers? from left to right. Rules : A. B. (i) If a two-digit odd number is followed by a prime number, the first number is to be multiplied by the C. D. prime number. 9. P, Q, R, S, T, V and W are sitting around a circle facing (ii) If an even number is followed by another even the centre. R is third to the right of V, who is second to number, the first number is to be divided by the the right of P. T is second to the left of Q, who is second second number. to the left of W. V is sitting between S and W. (iii) If an odd number is followed by a composite odd Who is sitting between T and V? number, the first number is to be added to the A. W B. R second number. C. S D. Can't be determined (iv) If an even number which is a multiple of 5 is followed by another number which is again a 10. Read the following information carefully. multiple of 5, the second number is to be subtracted 'A«B' means 'A multiplied by B'. from the first number. 'A@ B' means 'A minus B'. (v) If a number which is a perfect square is followed 'A $ B' means 'A plus B'. by another number which is also a perfect square, 'A # B' means 'A divided by B'. then the square roots of the two numbers is to be Mohit donates 7% of his monthly salary R to charity multiplied. and spends ` 3,000 per month on his house rent. What is the amount left with him out of his monthly salary 64 25 25 after excluding house rent and charity amount? 88 8 n If n is the resultant of the first row, what is the resultant A. R @ (3000 @ 7 « 100#R) of the second row? B. R @ (7 « R # 100 @ 3000) A. 24 B. 36 C. R @ (R « 7 # 100 $ 3000) C. 28 D. 26 D. None of these 2 | 19th NSO | Class-8 | Set-A | Level 1  Science 11. A simple pendulum, oscillating with time period T, is 17. The given figure shows a set-up shown in the figure. Time taken by the bob to move for testing conduction of electricity from A to C is t1 and from C to O is t2. Then in different liquids. Pick out the group of liquids for which the bulb will not glow. Extreme A. Milk, Lemon juice, Tap water, Honey Extreme Point A B Point B. Vinegar, Tap water, Kerosene, Lemon juice C O C. Honey, Kerosene, Vegetable oil, Distilled water A. Motion of the bob is uniform with T = 2(t1 + t2) D. Vegetable oil, Distilled water, Vinegar, Kerosene B. Motion of the bob is uniform with T = 4(t1 + t2) C. Motion of the bob is non uniform with T = 2(t1 + t2) 18. Why does a horse need to pull harder during the first D. Motion of the bob is non-uniform with few steps in pulling the cart? T = 4(t1 + t2). A. Static friction is greater than sliding friction. 12. A box is being pushed horizontally along a rough B. Sliding friction is greater than rolling friction. surface and a constant acceleration is achieved. If the C. No frictional force acts after the cart comes in push is stopped, the box will motion. A. Slow down and finally stop D. Air friction is greater during first few steps of B. Continue to move at constant speed motion. C. Continue to accelerate at a lower rate D. Stop immediately. 19. Which of the following statements are correct? (i) Venus is the hottest planet of the solar system. 13. A block of mass 4 kg and dimensions 10 cm × 20 cm × 30 cm (ii) Jupiter is called the red planet as it has a large red rests on the floor. If g = 10 m s–2 , then the maximum pressure the block can exert on the floor is spot on its surface. (iii) Revolving speed of Mercury is fastest of all planets. A. 2000 N m–2 B. 1000 N m–2 (iv) Mars has no natural satellites of its own. C. 4000 N m–2 D. 1333 N m–2 (v) Saturn is the least dense planet among all planets. 14. Which of the following statements are true about both A. (ii) and (iii) only light and sound ? B. (ii), (iv) and (v) only (i) They are forms of energy. C. (i), (iii) and (v) only (ii) They can be converted into other forms of energy. D. (i), (ii), (iv) and (v) only (iii) They undergo reflection. A. (i) and (ii) only B. (ii) and (iii) only 20. Two uncharged conducting spheres are placed in contact C. (i) and (iii) only D. (i), (ii) and (iii) with each other. Which of the following diagrams best represents the charge distribution when a negatively 15. Which of the following options correctly represents charged rod is placed near one of them? the relative positions of the Sun (S), Moon (M) and Earth (E) on the day of full moon and new moon? A. Full Moon New Moon A. MES MSE B. SME ESM B. C. SEM SME D. ESM EMS 16. What is the use of cooking oil in frying a fish in terms C. of heat transfer? A. To increase rate of heat transfer to the fish via D. radiation. B. To increase rate of heat transfer to the fish via convection. 21. The intensity of sound wave gets reduced by 10% on C. To increase rate of heat transfer to the fish via passing through a slab. The total reduction in intensity conduction. on passing through three consecutive slabs is D. To increase rate of heat transfer to the fish via A. 30% B. 70% evaporation. C. 27.1% D. 72.9% 19th NSO | Class-8 | Set-A | Level 1 | 3 22. The given table shows the melting and boiling points Statement 2 : The process represents a physical change of four elements. as the substance formed is composed of same elements sulphur, oxygen and hydrogen. Element Melting point Boiling point A. Both statements 1 and 2 are true and statement 2 is E1 198°C 390°C the correct explanation of statement 1. E2 –101°C 150°C B. Both statements 1 and 2 are true but statement 2 is E3 185°C 1087°C not the correct explanation of statement 1. E4 20°C 160°C C. Statement 1 is true and statement 2 is false. Which element is in liquid state at 311°F? D. Both statements 1 and 2 are false. A. E4 B. E3 27. Match the Column I with Column II and select the C. E2 D. E1 correct option from the given codes. Column I Column II 23. The given diagram shows a girl standing at a position X in (i) Turmeric solution (P) Aqueous solution of front of a plane mirror, at a distance of x m from the mirror. remains yellow sodium bicarbonate When she moves y m away to a new position Y, the distance (ii) China rose indicator (Q) Aqueous solution between the girl and her image increases by 8 m. turns green of sugar What is the value of y ? (iii) Methyl orange (R) Aqueous solution of A. 2 m indicator turns red ammonium hydroxide (iv) Phenolphthalein (S) Aqueous solution B. 4m indicator turns pink of hydrogen chloride C. 8 m gas D. Data insufficient (i) (ii) (iii) (iv) A. Q, S R, S P, S P, R 24. Read the given statements and select the correct B. P, R S P, R Q, S option. Statement 1 : Smoke goes upwards. C. Q, S P, R S P, R Statement 2 : The warm air is lighter than the cold air. D. P Q R S A. Both statements 1 and 2 are true and statement 2 28. Fill in the blanks left in the classification of the fossil is the correct explanation of statement 1. fuels. B. Both statements 1 and 2 are true but statement 2 Fossil fuels is not the correct explanation of statement 1. Plants and trees Aquatic plants and animals C. Statement 1 is true but statement 2 is false. p q D. Both statements 1 and 2 are false. Destructive Fractional 25. The given figure shows a circuit which contains three distillation distillation identical lamps and two switches. Gaseous Solid Gaseous Solid product residue product residue u v w x p q u v w x A. Petro- Coal Petro- Bitumen Coal gas Coke leum leum B. Coal Petro- Coal Coke Petro- Bitu- Which of the following statements is correct regarding leum gas leum gas men the given circuit? C. Coal Petro- Coal Char- Gasoline Coal A. When switch 2 is closed and switch 1 is open, all leum gas coal tar the three lamps glow. D. Petro- Coal Gaso- Bitumen Natural Coke B. When switch 2 is closed and switch 1 is open, leum line gas only lamp 1 and lamp 3 glow. C. When switch 1 is closed and switch 2 is open, 29. When a copper vessel is exposed to moist air for long, only lamp 2 glows. it acquires a dull green coating. The reaction can be D. When both switch 1 and switch 2 are closed, all represented as the three lamps glow. 2Cu + → Cu(OH)2 + Z 26. Read the given statements and select the correct option. W, X, Y and Z are respectively Statement 1 : The gas produced on burning sulphur A. N2 , CO2 , O2 and CuO in air is dissolved in water to form an acidic solution. B. H2O, N2 , CO2 and O2 4 | 19th NSO | Class-8 | Set-A | Level 1  C. H2O, CO2 , O2 and CuCO3 Z : I do not get wrinkled easily. I burn slowly and D. H2O, CO2 , O2 and CuO. produce black smoke. W, X, Y and Z are respectively 30. Fill in the blanks by choosing an appropriate option. A. Terylene, rayon, cotton and nylon Acids are compounds that contain (i) atoms. Sulphuric B. Bakelite, nylon, rayon and cotton acid is one such example which is a (ii) acid. It is C. Melamine, PVC, nylon and rayon neutralised by alkalies and forms salts called (iii) . Acids react with metals to give (iv) gas. D. Nylon, cotton, rayon and polyester. (i) (ii) (iii) (iv) 34. Refer to the given Venn diagram and select the correct A. Hydrogen Weak Sulphites Oxygen option regarding P, Q and R. B. Oxygen Weak Sulphates Hydrogen C. Hydrogen Strong Sulphites Oxygen Plants that Plants that D. Hydrogen Strong Sulphates Hydrogen grow in are leafless nitrogen and rootless 31. Which of the following statements are true? deficient soil Q I. In the luminous zone of candle flame, vaporised P wax gets oxidised to carbon dioxide which burns R with a blue flame. Plants that prepare their carbohydrates II. There is no burning in the dark inner zone of the through flame. photosynthesis III. Non luminous zone is the hottest part of the flame. A. Plant P possesses special root like structures IV. Luminous zone of a f lame is mainly due to called haustoria for absorption of nitrogen from incomplete burning of carbon. atmospheric air. A. I and III only B. II and III only B. Plant Q catches and digests insects and shows C. II, III and IV only D. All of these completely heterotrophic mode of nutrition. C. R could be Nepenthes or Rafflesia. 32. Rahul, a class 8 student conducted the following experi- D. P could be Dionaea whereas Q could be ment and recorded the observations in the given table. Cuscuta. 35. Refer to the given figures and select the correct option regarding species P, Q and R. Obser- Does balloon Is ignition vation explode? temperature of A. Fruits of species P burst open forcibly after drying balloon reached? and seeds are scattered nearby. Fig. 1 Fig. 2 Fig. 1 Fig. 2 B. Seeds of species R possess wings or hair-like I. Yes Yes No Yes structures. II. Yes No Yes No C. P could be Hiptage whereas Q could be balsam. III. No Yes Yes Yes D. Seeds of species Q are heavy and bear spines or The correct observation and inference drawn are hooks. A. I, balloon has a higher ignition temperature than water hence, it explodes 36. Read the given paragraph with few blanks and select the option that correctly fills up any 3 of these. B. II, water increases the melting point of balloon (i) is the ability to blend with the surroundings. C. III, water in the balloon absorbs the heat It is protective to prey insects like (ii) and also D. II, water conducts the heat away from the advantageous to predators like (iii) . balloon. (iv) is the resemblance of one species with another. 33. The characteristics of different fibres are listed as The species which is imitated is called (v) while the species which imitates is called (vi) . W : I am strong, elastic, light and burn slowly. A. (i) – Mimicry, (iv) – Camouflage, (vi) – Mimic I shrink on heating and form hard beads with B. (ii) Leaf insect, (iv) – Mimicry, (v) – Model smell of burning hair. X : I burn completely leaving no residue. C. (i) – Camouflage, (iii) – Praying mantis, Y : I can be woven like silk fibres and dyed in a wide (vi) – Model variety of colours. I burn quickly with a smell of D. (ii) – Grasshopper, (iii) – Stick insect, burning paper. (v) – Mimic 19th NSO | Class-8 | Set-A | Level 1 | 5 37. The given figure represents the pattern of blood (iv) Some species of X help in manufacture of ethyl circulation in human body. alcohol whereas several species of Y help in biological nitrogen fixation. (v) Several species of groups X and Y are used in making antibiotics. A. (i), (ii) and (iii) only B. (i), (iii) and (v) only Select the correct statement regarding this. C. (ii) and (iv) only D. (iv) and (v) only A. Q and R carry deoxygenated blood whereas P and 40. Study the given flow chart. S carry oxygenated blood. P B. X represents right side of heart, i.e., right atrium No and ventricle. Cell organelle Cell organelle C. Q and P carry oxygenated blood whereas R and S bound by No bound by carry deoxygenated blood. double membrane single membrane D. Y represents left side of heart, i.e., left atrium and Yes Yes ventricle. No Present in No Present in S Q 38. The given figure shows positions animal cell plant cell of few endocrine glands in human Z Yes Yes body. X T R Two patients, Ravi and Sohail recently visited an endocrinologist regarding Which of the following holds true for P, Q, R, S their health issues. and T ? Doctor examined them and prepared Y A. P takes part in cell autophagy and autolysis whereas a chart shown here to keep a record W Q takes part in osmoregulation. of their illness and monitor their B. R takes part in protein synthesis and is also present health. in bacteria. Patient's name Disease symptoms C. Inner membrane of T contains stalked particles Ravi Swollen neck whereas inner membrane of S is connected to Sohail Large quantities of sugar in blood thylakoids at various places. and urine D. T takes part in preparation of food whereas S takes Refer to the given figure and chart and select the part in oxidation of food to release energy. correct option. A. Ravi is suffering from goitre which is caused due 41. The given diagram shows a respirometer that is to hyposecretion of a hormone by gland X. used to measure gaseous exchange in pea seeds. The B. Ravi is suffering from cretinism which is caused apparatus is maintained at a constant temperature. due to hypersecretion of a hormone by gland Y. C. Sohail is suffering from diabetes which is caused by hyposecretion of a hormone by gland W. D. Sohail is suffering from diabetes which is caused by hypersecretion of a hormone by gland Z. 39. X and Y are two groups of microorganisms. Group X includes all unicellular forms which lack an organised nucleus. Group Y includes both unicellular and multicellular forms with organised nucleus. Both Which of the following is incorrect regarding this? groups do not possess chlorophyll. Identify the groups and select the correct statements A. The gas pressure in X will fall as O2 is absorbed regarding them. during respiration and CO 2 is absorbed by potassium hydroxide solution. (i) Several species of groups X and Y help in decomposition of biodegradable wastes, thus help B. The fluid level at Y will fall to compensate the in waste disposal. loss of pressure in X. (ii) Some species of groups X and Y possess thread C. The gas pressure at X will rise as O2 is given out by like structures called hyphae. seeds and CO2 is released by potassium hydroxide (iii) Species of X cause tuberculosis and anthrax diseases solution. in animals whereas species of Y cause rust and D. The fluid level at Z will rise due to loss of pressure smut diseases in plants. at X. 6 | 19th NSO | Class-8 | Set-A | Level 1 42. Refer to the given diagram of 44. Read the following statements and select the correct human male reproductive system option. and select the incorrect statement X A. A daughter receives X-chromosome from her regarding parts X, Y and Z. mother only. A. Z deposits sperms into the Z B. Human beings possess 22 pairs of autosomes and vagina of female during Y 1 pair of sex chromosomes. coitus. C. A new human individual develops from a cell B. Y is similar in function to ovaries of female. called gamete only. C. X conducts sperms from testis to urethra. D. Pituitary gland produces thyroxine. D. Y lies within scrotum in the abdominal cavity. 45. Match column I with column II and select the correct 43. Identify P, Q and R in the given flow chart and select option from the given codes. the correct option regarding them. Column I Column II Threatened species No Extinct species P. Anopheles (i) A fungus from which Yes Yes antibiotic is obtained Vulnerable No Endangered P Q. Rhizobium (ii) A viral disease species species R. Penicillium (iii) A bacterium responsible Yes Yes for curdling of milk R Q S. Hepatitis B (iv) Nitrogen fixing bacterium A. P – Passenger pigeon, Q – Golden langur, T. Lactobacillus (v) Edible fungus R – Great Indian bustard U. Mushroom (vi) Vector for malarial parasite B. P – Sloth bear, Q – Chinkara deer, A. P-(vi), Q-(iv), R-(i), S-(ii), T-(iii), U-(v) R – Asian elephant B. P-(ii), Q-(v), R-(iii), S-(i), T-(vi), U-(iv) C. P – Olive Ridley turtle, Q – Komodo dragon, C. P-(iv), Q-(vi), R-(i), S-(v), T-(ii), U-(iii) R – Blue whale D. P-(i), Q-(iii), R-(iv), S-(ii), T-(vi), U-(v) D. P – Dodo, Q – Red panda, R – Indian rhinoceros Achievers Section DIRECTION (Q. No. 46 and 47) : Refer to the given passage 48. The given graph shows the changes in various factors and answer the following questions. (P, Q and R) present in a water body after the sewage A balloon is moving upwards  discharge at point X. from ground with a constant speed of 10 m s–1 at a distance Amount/Number 5 m infront of a plane mirror P of length 2 m as shown in figure. A source S is placed symmetrically before plane mirror. Q The plane mirror is placed at a height H = 15 m above the X R surface of ground. O Sewage discharge 46. The maximum time interval during which a man inside Distance downstream the balloon can see the image of the source in the mirror is Refer to the given graph and select the correct option regarding P, Q and R. A. 2.2 s B. 1.7 s C. 4.6 s D. 0.5 s A. P could be bacteria which increase tremendously in number to decompose nitrogen rich sewage. 47. When the balloon is at a height of 17 m from the B. Q corresponds to biological oxygen demand which ground, the man drops a stone from it then the decreases due to accumulation of sewage on water maximum height attained by the stone will be surface. (g = 10 m s –2) C. R could be aquatic animals like fish which die on A. 17 m B. 20 m account of non-availability of dissolved oxygen. C. 22 m D. 27 m D. Both A and C 19th NSO | Class-8 | Set-A | Level 1 | 7 49. Ms. Deepika, a science teacher demonstrated an 50. Read the given paragraph where few words have been activity in the science lab and the experiment was italicised. set up as shown in the figure. Preparation of soil in a field, before sowing of seeds Syringe involves two steps : broadcasting and levelling. Soil steam in the crop field is enriched with nutrients by adding metal X manures and fertilisers to it. Crop fields need to be heat irrigated from time to time. In sprinkler system of irrigation water is allowed to fall drop by drop from a The metal ‘X’ reacts with steam to form a gas ‘Y’ pipe just near the plant roots whereas in drip irrigation which is collected in the syringe. water escapes from a revolving nozzle. Weeding in Which of the following best describes the metal crop fields can be done using thresher. After the crop ‘X’ and gas ‘Y’? is harvested, the grain is separated from cut crop using A. Metal ‘X’ is silver and gas ‘Y’ is hydrogen which a machine called harvester. burns with a pop sound. Select the correct option regarding these. B. Metal ‘X’ is sodium and gas ‘Y’ is carbon dioxide A. Broadcasting should be replaced by winnowing. which gives white precipitate with lime water. B. Positions of sprinkler system and drip irrigation C. Metal ‘X’ is iron and gas ‘Y’ is hydrogen which should be interchanged. burns with a pop sound. C. Thresher should not be replaced as it is correctly D. Metal ‘X’ is magnesium and gas ‘Y’ is carbon dioxide mentioned. which gives white precipitate with lime water. D. Harvester should be replaced by seed drill. SPACE FOR ROUGH WORK 8 | 19th NSO | Class-8 | Set-A | Level 1 Class 8 19th Set B Year 2016  logical reasoning 1. The minimum number of straight lines required to A. NSWX B. KPSU make the given figure is _____. C. HMQR D. EJNO A. 23 6. How many odd numbers are there in the following B. 22 series which are immediately followed by an odd C. 17 number? D. 18 51473985726315863852243496 2. The following letters are coded as follows. A. 1 B. 2 Letter :BMKATREUNHFIWDP C. 4 D. More than 4 Digit/Symbol : 7 % 5 © 6 9 8 2 @ 1 # $ 3 « 4 7. Two positions of a dice are shown below. When there While coding the given letters following conditions are two dots at the bottom, the number of dots at the are also to be observed. top will be _______. Conditions : (i) If the first letter is a vowel and the last letter is a A. 3 consonant, both are to be coded as the code for B. 5 the vowel. C. 6 (ii) If the first letter is a consonant and the last D. Cannot be determined letter is a vowel, codes for these two are to be 8. Which of the following Venn diagrams best depicts interchanged. the relationship amongst, ‘Singers, Dancers, Actors’ ? (iii) If both the first and the last letters are consonants, both are to be coded as the code for the last letter. A. B. MATRBW A. % © 6973 B. 3 © 6973 C. % © 697% D. 3 © 697% C. D. 3. Select the figure from the options which will replace the (?) to complete the given figure matrix. 9. A square transparent sheet with a pattern is given. Find the option as to how the A.  pattern would appear when the transparent sheet is folded along the dotted line. B. A. B. C. ? C. D. D. 10. Six friends – Mohit, Arun, Amit, Samrath, Aman and Siddharth are studying six different specialisations which are – metallurgy, telecommunication, humanities, 4. Mini goes to the Departmental Store, which is to the mechanical, electrical and electronics not necessarily in North of her house, 6 km away by an auto. After the the same order. Each one likes a different sport which shopping she decides to visit her friend Trishu, hence are hockey, cricket, swimming, football, badminton turns to the right and reaches her friend’s house which and tennis again not in the same order. Samrath is is 8 km away. From there she visits a shop which is not studying electronics. Aman is studying humanities 6 km away, taking a right turn. Finally, she turns to the and likes hockey. Amit likes swimming and is not right and phones up to the house to send the car. studying electronics. The one who likes football is In what direction should the driver take the car to studying electrical. Siddharth is studying mechanical pick up Mini to bring her back? and does not like tennis. The one who likes badminton is studying telecommunication. Mohit and Arun do A. West B. East not like badminton. Mohit does not like tennis. C. South D. North Which sport does Mohit like? 5. Three of the following four are alike and hence form A. Football B. Cricket a group. Which one does not belong to that group? C. Hockey D. None of these 2 | 19th NSO | Class-8 | Set-B | Level 1  SCIENCE 11. The speed-time graphs of motion of two bicycles X water before and after heating. Which of the following and Y are shown here. If at t = 0 s, both X and Y are correctly describes the temperature recorded by the at same position, then at what time will they be at thermometer as compared to the actual temperatures of same position again? –1 the water before and after heating, and the temperature Speed (m s ) X difference recorded by the thermometer and the actual A. 2 s 10 8 temperature difference? B. 2.5 s 6 4 Reading Reading Temperature C. 5 s 2 Y before after difference Time(s) D. After 6 s 0 1 2 3 4 5 6 heating heating A. Lower Lower Low 12. A solid object moving through a fluid experiences a B. Lower Higher High frictional force exerted by the fluid. At a particular C. Lower Lower Same instant the frictional force exerted by the fluid does D. Higher Higher Same not depend on A. Shape of the object 18. Read the given statements and select the correct option. B. Speed of the object Statement 1 : It is difficult to drive a vehicle at high C. Nature of the fluid speed on a rainy day. D. Volume of the fluid. Statement 2 : Friction depends on the nature of surfaces 13. The given figure shows a statue. in contact. It exerts a pressure of 340 Pa on A. Both statements 1 and 2 are true and statement 2 the floor. What is the weight of the is the correct explanation of statement 1. statue if base area of its one foot is B. Both statements 1 and 2 are true but statement 2 17 cm2 ? is not the correct explanation of statement 1. A. 5.780 N B. 1000 N C. Statement 1 is true but statement 2 is false. C. 1.156 N D. 2000 N D. Both statements 1 and 2 are false. 14. While trying to put out a fire in an electric appliance, 19. The diagram shows a converging lens producing we should pour______ on it. an upright and virtual image. A. Distilled water B. Tap water Which of the following C. Rain water D. Salt water optical instruments uses this arrangement? Image Object 15. Which of the following statements is incorrect about A. A camera constellation? B. A magnifying glass Lens A. It is a group of stars that has recognisable shape. C. A photographic enlarger B. It appears to move in the sky from east to west. D. A projector C. It consists of large number of stars but we are able to see only the bright ones. 20. Meera’s father was born on February 2, 1977. How D. All the stars of a constellation are at the same many complete turns has he gone round the sun till distance from us. October 20, 2016? 16. Which of the following statements about conduction A. 28 B. 39 are true? C. 40 D. 77 (i) Conduction can transfer heat faster in denser 21. Match the column I with column II and select the medium. correct option. (ii) Conduction can transfer heat faster through good electrical conductors. Column I Column II P. Convex mirror 1. Peep-hole in the door (iii) C o n d u c t i o n c a n n o t h a p p e n a l o n g w i t h Q. Convex lens 2. Shop security mirror convection. A. (i) and (ii) only B. (i) and (iii) only R. Concave lens 3. Reflector of torch C. (ii) and (iii) only D. (i), (ii) and (iii) S. Concave mirror 4. Magnifying glass A. P–2, Q–3, R–4, S–1 17. A student is given a thermometer that reads –1°C for the B. P–2, Q–4, R–1, S–3 lower fixed point and 99°C for the upper fixed point. He C. P–1, Q–4, R–3, S–2 uses the thermometer to measure the temperature of some D. P–3, Q–1, R–4, S–2 19th NSO | Class-8 | Set-B | Level 1 | 3 22. Rearranging charges in uncharged metal object without 27. Sohail conducted an experiment by taking a candle contact with charged object is called and a steel spoon. He put the spoon in the middle of A. Conduction B. Discharge the yellow part of the candle flame for a few seconds. C. Insulation D. Induction. He observed black deposition on the spoon. What can be concluded from this experiment? 23. Two plane mirrors AB and CD are placed at right angle to one another. A ray of light PQ hits AB at Q making an angle of 45° as shown in the diagram. This ray will be reflected from mirror CD at an angle of D A. 20° A P 45° B. 35° Q Plane 90° Plane A. Wax is an inflammable substance hence, it burns C. 45° mirror mirror with a smoky flame. D. 60°. C B B. Unburnt carbon particles produce smoke (soot) 24. The given figure shows a circuit which contains three which gets deposited on the spoon. identical bulbs B1, B2 , B3 and four switches S1, S 2 , C. Yellow region of the flame is the hottest hence, S 3 and S 4. it produces smoke. B1 S1 D. Out of three colours (blue, black and yellow) of the flame, black being the darkest gets deposited on the spoon. B2 S2 B3 28. Study the given table carefully and choose the incorrect S3 S4 match. Which of the following combinations of switch S. Object/ Malleability Conductor positions will make all the three bulbs to glow? No. material of electricity S1 S2 S3 S4 I. Iron nail   A. Closed Open Closed Open II. Coal piece   B. Closed Closed Open Closed III. Aluminium block   C. Open Closed Closed Closed IV. Pencil lead   D. Closed Open Closed Closed A. I and II only B. II and III only 25. It is known that normally at 90 dB, it takes about C. I, III and IV only D. All of these 8 hours for the damage to receptor nerves of ear to occur. Further, it is found that if the sound level is 29. Some materials are listed as : increased by 5 dB, the safe exposure limit is cut to (a) Cotton (b) Dacron half. Based on the information, what is the non-stop (c) Bakelite (d) Jute exposure time for a 105 dB sound to damage the ear? (e) Terylene (f) Melamine They are classified as A. 1 h B. 2h (i) Biodegradable C. 4 h D. 5h (ii) Manufactured from petroleum products 26. Three colourless liquids I, II and III are tested with red (iii) Thermosetting plastics and blue litmus papers with the following results: Choose the correct match. A. (i) – c, d; (ii) – a, e; (iii) – b, f Paper I II III B. (i) – d, f; (ii) – a, c; (iii) – b, e Red litmus Stays red Stays red Turns blue C. (i) – a, d; (ii) – b, c; (iii) – e, f Blue litmus Turns red Stays blue Stays blue D. (i) – a, d; (ii) – b, e; (iii) – c, f Which of the following is the correct identification of 30. In a biogas plant, anaerobic bacteria digest animal I, II and III? waste and produce biogas (Process I) which is burnt as A. I is lime water, II is common salt solution and household fuel (Process II). III is hydrochloric acid. In the given Venn diagram, processes I and II are best B. I is amla juice, II is lemon juice and III is caustic described by point(s) soda solution. Chemical Physical change C. I is vinegar, II is sugar solution and III is baking change 1 2 3 soda solution. D. I is window cleaner, II is milk of magnesia and A. 1 B. 2 III is soap solution. C. 3 D. 1 and 3 respectively. 4 | 19th NSO | Class-8 | Set-B | Level 1 31. A brief description of four substances is given as: 35. Given figure represents a breathing process. W : Obtained from natural gas and is used in the production of urea. X : Contains mainly carbon and is obtained by carbonisation of dead vegetation. Y : A petroleum product used for road surfacing. Z : Used as a fuel for jet aircrafts. W, X, Y and Z are respectively During this process __________. A. CNG, coke, coal tar and diesel A. Air from atmosphere rushes into the lungs B. Hydrogen, coal, bitumen and kerosene B. Volume of thoracic cavity and lungs decreases C. Coal gas, coke, coal tar and kerosene C. The air pressure inside the lungs decreases D. Hydrogen, coke, bitumen and diesel. D. Both A and B 32. Observe the given flowchart and mark the appropriate 36. Refer to the given dichotomous key and select the option correctly representing I, II and III. correct option regarding P, Q, R, S and T. Substances I. (a) It is a method of asexual reproduction in plants. - Go to II (I) in taste. Bitter in taste. (b) It is a method of asexual reproduction in animals. - Go to IV (III) neutralises the Wasp stings II. (a) Vegetative propagation by leaves – P effect of wasp sting. are (II). (b) Vegetative propagation by stems – Go to III I II III III. (a) Vegetative propagation by rhizomes – Q A. Sweet Neutral Baking soda B. Sour Acidic Calamine (b) Vegetative propagation by bulbs – R C. Sour Alkaline Vinegar IV. (a) Reproduction through binary fission – S D. Sweet Alkaline Calamine (b) Reproduction through budding – T 33. Fire triangle is represented as A. P – Potato, Q – Turmeric, R – Spirog yra, He shown in the figure: at emp S – Plasmodium, T – Hydra (to era t Eliminating one or more of the att tur B. P – Br yophyllum, Q – Ginger, R – Onion, en ain e) yg three factors helps in fighting fire. Ox S – Amoeba, T – Hydra ign Water, which is the most common itio C. P – Colocasia, Q – Mint, R – Potato, S – Paramecium, n fire extinguishing agent works by Combustible substance T – Sponge A. Raising the ignition temperature of the substance D. P – Strawberry, Q – Chlamydomonas, R – Onion, B. Removing the combustible substance S – Paramecium, T – Yeast C. Removing heat and oxygen D. Supplying CO2 which covers the fire like a blanket. 37. A factory is built beside a river. Water used to cool the machines as well as some factory waste containing 34. The given figures show two kinds of fruits. mercury are discharged into the river as shown in the given diagram. Factory Z Water used to cool X Y the machines Y How are X and Y adapted for their dispersal in the Factory X surroundings? W waste X Y River A. Fleshy and sweet Hair-like structure to stick Which of the following statements are correct regarding to attract animals onto bodies of animals this? B. Wing-like structure Hook-like structure to stick A. The quantity of fish in area W is the highest as to enable to float onto fur of animals compared to those in areas X, Y and Z. on water B. The fish present in area Z are not consumable as C. Air trapped within Hair-like structure to enable they are likely to contain poisonous mercury. its structure to enable to float on water C. Areas X and Y are directly affected by pollution to float on water so the chances of getting fish in this area are D. Wing-like structure Hair-like structure to get negligible. to get blown off with blown off with the wind D. All of these the wind 19th NSO | Class-8 | Set-B | Level 1 | 5 38. Anita bought a bunch of blue flowers with intact stems (iii) Testes are S sex organs of males which lie from the market. In order to find out whether the colour within T . was artificially introduced or not, she prepared a section (iv) The clone sheep U was developed by using of the stem and observed it under the microscope. cells from V and Scottish Blackface sheep. Which of the following correctly shows the condition of A. Q - Oviparous, S - Secondary, U - Rosie the section, if the colour was artificially introduced B. P - Metamorphosis, R - Viviparous, V - Finn Dorset in flowers. (The dark area is the place where the colour C. Q - Viviparous, T - Seminal vesicle, U - Dolly is present). D. R - Oviparous, S - Accessory, T - Scrotum 42. Refer to the given flow chart. A. B. Microorganism Yes Cell wall is present Yes C. D. No Organised nucleus is present P Yes No Q 39. Read the given paragraph. Chlorophyll is present Yes Organism X has leathery lips and a big hump, organism Y has thick layer of fur on skin and thick R layer of subcutaneous fat whereas organism Z is Identify organisms P, Q and R and select the correct brilliantly coloured and has sticky pads on its feet. option regarding them. Which of the following holds true for organisms X, A. P could be a multicellular microbe which causes Y and Z ? tetanus in humans. A. Organism X lives in a place inhabited by B. Q is always unicellular and could be saprophytic xerophytic plants. or parasitic. B. Organism Y hibernates in extreme winters. C. R could be a unicellular biflagellate microorganism C. Organism Z creates ghost images and uses startling which forms an important component of colouration to elude its predators. phytoplanktons. D. All of these D. P can reproduce only inside cells of host organisms and behaves as non-living entity outside the living 40. Refer to the given figure of a plant cell and select systems. the correct statement regarding organelles P and Q. 43. Refer to the given Venn diagram. Area meant Area meant for protection X for protection of ora Y of fauna Area where limited human economic activities allowed A. P synthesises energy but Q synthesises lipids. B. Presence of both P and Q in a plant cell maximise Identify X and Y and select the correct option regarding the rate of photosynthesis. them. C. P takes part in photosynthesis whereas Q takes part A. X is an in situ method of biodiversity conservation in protein synthesis. whereas Y is an ex situ method of biodiversity D. Amount of P and Q remains fixed in all cell types. conservation. B. Human activities are allowed only in the core 41. Read the following statements with few blanks and zone of Y however the buffer zone remains select the option that correctly fills any three of these undisturbed. blanks. C. X is an area that is owned and protected by a (i) P is the transformation of a larval form into national government for the purpose of recreation an adult animal. and development. (ii) Egg laying animals are called Q whereas animals D. Hunting of animals is allowed in core zone which give birth to babies are known as R . of Y however, it is prohibited in all parts of X. 6 | 19th NSO | Class-8 | Set-B | Level 1 44. Read the given statements and select the correct option. Statement 1 : A plant or animal species which is exclusively found in a particular area and is not found naturally anywhere else, is known as endemic species. Statement 2 : The existence of endemic species is often threatened due to the introduction of exotic species from some other geographical area. A. Both statements 1 and 2 are true and statement 2 is the correct explanation of statement 1. A. Parasitic bacteria and fungi play an important role B. Both statements 1 and 2 are true but statement 2 in process II. is not the correct explanation of statement 1. B. If process I does not take place then there will be C. Statement 1 is true but statement 2 is false. no recycling of nutrients. D. Both statements 1 and 2 are false. C. Nitrogen fixation by free living and symbiotic 45. Refer to the given nitrogen cycle occurring in nature bacteria and lightning process both could be and select the correct option. process III. D. Both B and C Achievers Section Direction : Refer to the given passage and answer questions Which of the following statements is correct? 46 and 47. A. Copper will be precipitated in beaker I and there The given figure shows two men M and N, facing two flat will be no change in beakers, II, III and IV. and hard walls, wall 1 and wall 2. B. Copper will be precipitated in beaker IV and Wall 2 solutions in beakers I, II and III will become y colourless. C. There will be no change in beakers II and III and Wall 1 solutions in beakers I and IV will turn green and colourless respectively. 500 m D. There will be no change in beakers II and III and solutions in beakers I and IV will become colourless M 2400 m N and green respectively. Man N fires a gun, man M hears two echoes, one from wall 1 and second from wall 2. The speed of sound in air 49. Read the given paragraph where few words have been is given to be 325 m s–1. italicised. 46. After the firing of a gun by the man N, the man M Monoculture is growing of a single crop in one habitat. will hear the first echo in It makes mechanical harvesting easy and reduces pest A. 4.0 s B. 8.9 s infestation. But, it removes some nutrients specifically C. 8.0 s D. 10.5 s. from the area. Hence, crop rotation is more prevalent wherein leguminous and non-leguminous crops are 47. If the time difference between the two echoes as heard grown simultaneously on the same field. It replenishes by man M is 1.23 s, then distance between the walls, y is the soil with magnesium and improves soil fertility. It also increases pest infestation. A. 400 m B. 900 m Select the correct statement regarding this. C. 500 m D. 1300 m. A. Monoculture should be replaced with tissue culture. 48. Ms Nisha, a science teacher set up the given apparatus B. Easy should not be replaced as it is correctly to demonstrate displacement reactions : mentioned while magnesium should be replaced with boron. CuSO4 ZnSO4 FeSO4 CuSO4 C. Simultaneously should be replaced with alternately. solution solution solution solution Fe Fe Cu Zn D. Reduces and increases should not be replaced or filings filings turnings granules interchanged as they are correctly mentioned. (I) (II) (III) (IV) 19th NSO | Class-8 | Set-B | Level 1 | 7 50. The graph given below shows the changes in the Refer to the given graph and select the incorrect blood glucose concentrations of a healthy person and statement regarding it. a person with condition X. A. Person with condition X needs to take insulin injections before meals. Person with B. Urine of person with condition X contains some Blood glucose level (mg/dL) condition X amount of glucose. C. Condition X arises due to malfunctioning of few cells of pancreas. D. Condition X is the consequence of deficiency of Healthy person iodine in body. Time after meal (min) SPACE FOR ROUGH WORK 8 | 19th NSO | Class-8 | Set-B | Level 1  Answer Keys 15th nso SET A 1. (B) 2. (D) 3. (C) 4. (B) 5. (D) 6. (C) 7. (C) 8. (C) 9. (C) 10. (A) 11. (A) 12. (C) 13. (B) 14. (D) 15. (A) 16. (C) 17. (D) 18. (B) 19. (C) 20. (A) 21. (C) 22. (C) 23. (A) 24. (B) 25. (D) 26. (D) 27. (D) 28. (D) 29. (C) 30. (A) 31. (A) 32. (A) 33. (D) 34. (B) 35. (B) 36. (B) 37. (C) 38. (B) 39. (B) 40. (C) 41. (D) 42. (B) 43. (B) 44. (B) 45. (D) 46. (B) 47. (D) 48. (D) 49. (C) 50. (A) SET B 1. (B) 2. (B) 3. (B) 4. (B) 5. (A) 6. (B) 7. (C) 8. (D) 9. (B) 10. (B) 11. (A) 12. (B) 13. (A) 14. (B) 15. (C) 16. (D) 17. (A) 18. (A) 19. (B) 20. (A) 21. (C) 22. (A) 23. (D) 24. (A) 25. (D) 26. (C) 27. (A) 28. (D) 29. (A) 30. (C) 31. (A) 32. (B) 33. (D) 34. (B) 35. (C) 36. (B) 37. (D) 38. (B) 39. (B) 40. (B) 41. (A) 42. (D) 43. (B) 44. (A) 45. (C) 46. (C) 47. (C) 48. (A) 49. (D) 50. (C) 16th nso SET A 1. (D) 2. (D) 3. (B) 4. (B) 5. (D) 6. (C) 7. (D) 8. (D) 9. (C) 10. (D) 11. (D) 12. (B) 13. (D) 14. (B) 15. (D) 16. (D) 17. (A) 18. (B) 19. (A) 20. (C) 21. (D) 22. (B) 23. (B) 24. (C) 25. (A) 26. (C) 27. (A) 28. (D) 29. (D) 30. (C) 31. (B) 32. (A) 33. (D) 34. (B) 35. (B) 36. (B) 37. (C) 38. (B) 39. (D) 40. (C) 41. (D) 42. (B) 43. (D) 44. (D) 45. (B) 46. (A) 47. (D) 48. (D) 49. (B) 50. (C) SET B 1. (D) 2. (D) 3. (C) 4. (D) 5. (B) 6. (D) 7. (A) 8. (B) 9. (D) 10. (D) 11. (A) 12. (D) 13. (A) 14. (B) 15. (C) 16. (B) 17. (B) 18. (B) 19. (A) 20. (B) 21. (D) 22. (A) 23. (B) 24. (B) 25. (A) 26. (C) 27. (B) 28. (C) 29. (B) 30. (D) 31. (B) 32. (C) 33. (B) 34. (A) 35. (D) 36. (B) 37. (C) 38. (C) 39. (A) 40. (B) 41. (C) 42. (D) 43. (D) 44. (D) 45. (D) 46. (C) 47. (B) 48. (A) 49. (B) 50. (D) 17th nso SET A 1. (D) 2. (A) 3. (A) 4. (B) 5. (B) 6. (B) 7. (D) 8. (B) 9. (D) 10. (B) 11. (B) 12. (D) 13. (D) 14. (D) 15. (C) 16. (B) 17. (B) 18. (A) 19. (C) 20. (B) 21. (C) 22. (D) 23. (A) 24. (C) 25. (D) 26. (A) 27. (D) 28. (A) 29. (B) 30. (A) 31. (C) 32. (B) 33. (B) 34. (A) 35. (C) 36. (C) 37. (D) 38. (D) 39. (A) 40. (B) 41. (D) 42. (B) 43. (A, B) 44. (D) 45. (D) 46. (D) 47. (D) 48. (C) 49. (D) 50. (D) SET B 1. (A) 2. (D) 3. (B) 4. (B) 5. (D) 6. (D) 7. (C) 8. (D) 9. (C) 10. (C) 11. (D) 12. (A) 13. (A) 14. (C) 15. (C) 16. (B) 17. (B) 18. (B) 19. (D) 20. (A) 21. (C) 22. (B) 23. (B) 24. (B) 25. (A) 26. (C) 27. (B) 28. (A) 29. (B) 30. (C) 31. (D) 32. (C) 33. (C) 34. (D) 35. (A) 36. (A) 37. (A) 38. (D) 39. (A) 40. (D) 41. (B) 42. (B) 43. (D) 44. (C) 45. (B) 46. (C) 47. (D) 48. (D) 49. (B) 50. (B) 18th nso SET 1 1. (B) 2. (C) 3. (C) 4. (C) 5. (D) 6. (A) 7. (B) 8. (D) 9. (C) 10. (A) 11. (D) 12. (C) 13. (D) 14. (A) 15. (D) 16. (B) 17. (D) 18. (B) 19. (C) 20. (A) 21. (D) 22. (A) 23. (B) 24. (B) 25. (D) 26. (A) 27. (D) 28. (D) 29. (A) 30. (B) 31. (C) 32. (C) 33. (D) 34. (B) 35. (D) 36. (D) 37. (D) 38. (A) 39. (C) 40. (D) 41. (D) 42. (C) 43. (D) 44. (D) 45. (D) 46. (B) 47. (C) 48. (A) 49. (D) 50. (C)  SET 2 1. (D) 2. (C) 3. (B) 4. (B) 5. (A) 6. (D) 7. (B) 8. (A) 9. (C) 10. (C) 11. (C) 12. (D) 13. (B) 14. (C) 15. (D) 16. (C) 17. (B) 18. (D) 19. (C) 20. (D) 21. (B) 22. (B) 23. (C) 24. (B) 25. (A) 26. (A) 27. (C) 28. (D) 29. (C) 30. (B) 31. (C) 32. (A) 33. (B) 34. (D) 35. (C) 36. (B) 37. (D) 38. (B) 39. (B) 40. (A) 41. (A) 42. (D) 43. (C) 44. (B) 45. (C) 46. (B) 47. (C) 48. (B) 49. (D) 50. (B) 19th nso SET A 1. (B) 2. (B) 3. (C) 4. (D) 5. (D) 6. (C) 7. (B) 8. (A) 9. (C) 10. (C) 11. (D) 12. (A) 13. (A) 14. (D) 15. (C) 16. (C) 17. (C) 18. (A) 19. (C) 20. (C) 21. (C) 22. (A) 23. (B) 24. (A) 25. (B) 26. (C) 27. (C) 28. (B) 29. (C) 30. (D) 31. (C) 32. (D) 33. (D) 34. (D) 35. (A) 36. (B) 37. (C) 38. (A) 39. (B) 40. (C) 41. (C) 42. (D) 43. (D) 44. (B) 45. (A) 46. (A) 47. (C) 48. (D) 49. (C) 50. (B) SET B 1. (C) 2. (B) 3. (D) 4. (B) 5. (B) 6. (D) 7. (A) 8. (A) 9. (D) 10. (A) 11. (C) 12. (D) 13. (C) 14. (A) 15. (D) 16. (A) 17. (C) 18. (B) 19. (B) 20. (B) 21. (B) 22. (D) 23. (C) 24. (D) 25. (A) 26. (C) 27. (B) 28. (A) 29. (D) 30. (C) 31. (B) 32. (C) 33. (C) 34. (D) 35. (B) 36. (B) 37. (D) 38. (B) 39. (D) 40. (C) 41. (B) 42. (C) 43. (C) 44. (B) 45. (D) 46. (C) 47. (A) 48. (C) 49. (C) 50. (D)