NSO LEVEL-1 Booklet For Class-VII

June 13, 2018 | Author: Nilesh Gupta | Category: Soil, Plants, Chemistry, Nature
Share
Report this link


Description

Class 715th Set A Year 2012 15th NSO - SET A 2 MENTAL ABILITY 1. Fill in the blank : The line segment joining a vertex of a triangle to the mid-point of its opposite side is called a ______ of the triangle. (A) Altitude (B) Median (C) Hypotenuse (D) None of these 2. Which of the following solids is made of the greatest number of unit cubes ? (A) (B) (C) (D) 3. A freezing process requires the room temperature to be lowered from 40°C at the rate of 8°C every hour. The room temperature 4 hours after the process begins is _______. (A) –8°C (B) 8°C (C) 72°C (D) –72°C 4. What is the smallest number of squares that must be added so that the line AB becomes a line of symmetry? (A) 5 (B) 4 (C) 2 (D) 3 5. The entrance charges for a resort are shown in Entrance Fee ` 200 per car the given table. Monday to Friday ` 75.50 per passenger Mr. Rajiv drove to the resort with his wife Radhika Saturday and Sunday ` 110.50 per passenger and three children on Saturday at 1.30 pm. They Parking charges ` 40.50 per hour left the resort at 8 p.m on the same day. How much did Mr. Rajiv and his family have to pay in all ? (A) ` 1015.75 (B) ` 1076.50 (C) ` 815.50 (D) ` 1036 6. Find the missing figure in the given series ? (A) (B) (C) (D) 7. Megha's salary in September was ` 18,000. Her salary in October was ` 16,000. What was the percentage decrease in her salary? (A) 12.5 % (B) 8.8 % (C) 11.11 % (D) 7.5 % 8. Mohit borrowed ` 12,000 from his friend. He gave ` 2000 at 18% and the remaining amount at 15%. How much interest did he pay in 3 years? (A) ` 5580 (B) ` 8550 (C) ` 5508 (D) ` 5055 9. If the code of RIGHT is SGJDY, what is UPDZJ the code for? (A) VERSE (B) VALID (C) TRAIN (D) TRADE 15th NSO - SET A 3 7 2 1 10. Beena bought m of cloth. She used m to sew a dress and m of the remainder for a skirt. 8 3 3 How much cloth did she have left? 1 7 5 5 (A) m (B) m (C) m (D) m 8 36 72 36 11. Amit, Priya, Latika, Garima and Rahul all go into a shop. l Only Garima buys a samosa. l Priya, Latika and Rahul buy a chocolate each. l Everyone except Priya buys an ice cream each. l Priya is the only one who buys toffees. l Nobody except Amit and Latika chooses a burger. l Each of the girls buy a packet of chips. Which child buys the most number of items? (A) Priya (B) Garima (C) Latika (D) Amit 12. In the given figure, PQ = PR and S is the midpoint of QR. Then DPSQ @ DPSR by ________ congruence. (A) SAS (B) SSS (C) Both (A) and (B) (D) None of these 13. What is the average number of ribbons made by the 5 girls ? (A) 42 (B) 50 (C) 45 (D) 48 14. Which of the following conditions is INCORRECT on the basis of the given figure, where l || m? (A) ∠3 + ∠5 = 180° (B) ∠3 =∠6 (C) ∠2 = ∠6 (D) ∠1 + ∠4 = 180° 15. Rohan is 12 years older than Kareena. After four years, Rohan's age will be equal to thrice the age of Kareena. Find the present age of Rohan. (A) 2 years (B) 12 years (C) 14 years (D) 4 years science 16. The warm water is poured slowly into a beaker of ice cubes as shown in figure. Which of the following options is correct, when the warm water was poured into the beaker ? 1. The ice starts to melt. 2. The glass expands. 3. The temperature of the ice increases 4. The temperature of the warm water decreases. (A) 1 and 4 only (B) 2 and 4 only (C) 1, 3 and 4 only (D) All of these 17. In which direction does the frictional force always act on an object moving across a horizontal surface ? (A) In the direction of the gravitational force (B) Opposite to the direction of the gravitational force (C) In the direction of motion (D) Opposite to the direction of motion 15th NSO - SET A 4 18. The graph shows the first few seconds of a car's journey. From the graph it can be seen that the car travels (A) At increasing speed and then stops (B) At constant speed and then slows down (C) With constant acceleration and then at constant speed (D) With constant acceleration and then stops 19. In the game of basketball, the ball is bounced (with no spin) towards a player at an angle of 40 degrees to the normal. What will be the angle of reflection? (A) 30° (B) 45° (C) 60° (D) 40° 20. How does cyclone decrease the fertility of the soil in the coastal areas? (A) By flooding the land with saline water (B) By dissolving soil and rocks (C) By increasing the water table of the place (D) By decreasing the water table of the place 21. In the figure Y, magnet P is experiencing ________. 1. Magnetic force of repulsion 2. Magnetic force of attraction 3. Elastic spring force 4. Gravity (A) 1 and 3 only (B) 1 and 4 only (C) 2 and 3 only (D) 2 and 4 only 22. The temperature shown by a mercury-in-glass thermometer increases. Which of the following is constant? (A) Density of the mercury (B) Internal energy of the mercury (C) Mass of the mercury (D) Volume of the mercury 23. When an electron moves from negative electrode to positive electrode, (A) Negative charge moves from negative electrode to positive electrode (B) Positive charge moves from positive electrode to negative electrode (C) No charge flows from either electrode to other electrode (D) Both (A) and (B) 24. Which of the following is not caused by friction or resistive forces? (A) A match lightning as it strikes a match box. (B) A car braking to a stop. (C) A pebble accelerating as it falls to the ground. (D) A meteor glowing as it falls through the atmosphere. 25. The average velocity of a body is equal to mean of its initial velocity and final velocity. The acceleration of the body is (A) Variable (B) Zero (C) Negative (D) Uniform 26. A reaction is carried out in a test tube as shown in figure. A gas comes out with hissing sound and bubbles. Which of the given test will confirm the presence of the gas which comes out? (A) Bring a burning splinter near the mouth of the gas tube, it burns brightly. (B) Pass the gas into lime water, it turns milky. (C) Pass the gas in red litmus solution, it turns blue. (D) Pass the gas into copper sulphate solution, it turns green. 15th NSO - SET A 5 27. Shuchi conducted an experiment to find the amount of light that could pass through four different materials. She recorded her results in the table below. Material Amount of light (lux) P 30 Q 120 R 0 S 60 Which of the above material is most suitable for making the lens of the magnifying glass? (A) P (B) Q (C) R (D) S 28. The table below shows the colours and solubilities of four solids in water. Solid Colour Solubility in water W Blue Insoluble X Blue Soluble Y White Insoluble Z White Soluble A mixture containing two solids is added to excess water, stirred and filtered. A blue filtrate and a white residue are obtained. Which two solids are present in the mixture? (A) W and X (B) W and Y (C) X and Y (D) X and Z 29. Five solutions have been taken in five test tubes labelled as A, B, C, D and E. They are tested with four indicators and the observations are recorded. Solution Methyl Orange Blue litmus Red litmus Phenolphthalein A Red Red Red Colourless B Red Red Red Colourless C Yellow Blue Blue Pink D Orange Blue Red Colourless E Red Red Red Colourless Which of the above solutions can neutralise each other? (A) A and B (B) D and E (C) B and C (D) B and D 30. Some blobs of wax are placed on a silver ring as shown in the diagram. If the ring is heated at X, then choose the correct option regarding the melting of wax because of heating. (A) Only R blob melts. (B) Blobs R, S and Q melt together. (C) Melting of blobs occurs in the order R, Q, S and P. (D) P, Q, R and S blobs melt together. 31. Reena prepared China rose indicator by keeping the petals of the flower in hot water for some time. She used the coloured solution for testing three solutions A, B and C. Solution A turns to dark pink, solution B remains light pink and solution C turns to green. Mark the correct option. Solution A Solution B Solution C (A) Lemon juice Sugar solution Milk of magnesia (B) Lemon juice Orange juice Sugar solution (C) Orange juice Vinegar Salt solution (D) Salt solution Milk of magnesia Lemon juice 15th NSO - SET A 6 32. The given flow chart is used to show some similarities and differences among four objects P, Q, R and S. One of the objects is a copper coin. Identify the copper coin from the given information. (A) P (B) Q (C) R (D) S 33. The given diagram shows a covered cup of hot chocolate. After some time, most of the heat from the hot chocolate is lost to the surroundings through the _________. (A) Steel lid (B) Marble tile (C) Foam cup (D) Wooden table 34. Observe the given Venn diagram. What does X and Y show ? (A) X - Jute, Y - Flax (B) X - Flax, Y - Jute (C) X - Jute, Y - Cotton (D) X - Cotton, Y - Jute 35. Priya wants to test presence of proteins in some food items. She took a cup of milk, some groundnuts and a raw potato. She made a paste of raw potato and powder of groundnuts by mashing and grinding them. She put equal quantities of three food items in three different test tubes and added, using a dropper ten drops of water, two drops of copper sulphate solution and ten drops of caustic soda solution to each test tube. She shook well all the three test tubes and let them stand for a few minutes. What result would she get for the test she performed ? [(+) indicates violet colour] Potato Groundnuts Milk (A) +++ ++++ + (B) ++++ – ++ (C) – + ++++ (D) + +++ – 36. Read the given activity. What would you most Activity likely observe for the plant and why ? Take a potted plant. Put it in a cardboard box (A) The plant would bend towards the hole because it has and close the box. Make a hole on one side of to exchange gases through hole. the cardboard box in such a way that light enters only through this hole. Keep watering the plant (B) The plant would grow upright inside the box because it regularly for a few days. is getting all the essential requirements for growth. (C) The plant would grow upright inside the box because it is not getting direct sunlight. (D) The plant would bend towards the hole because plant responds to light. 15th NSO - SET A 7 37. Arpita took a strip of blotting paper of 3 cm × 5 cm and clipped one half on the upper surface and the other half on the lower surface of a leaf. What would she most likely observe after one hour ? (A) Blotting paper clipped on the upper surface is more wet. (B) Blotting paper clipped on the lower surface is more wet. (C) Blotting paper is equally wet on both the surfaces of the leaf. (D) The observation cannot be predicted. 38. Leaves may be simple or compound. Which of the given figures can be called as compound leaves? (A) (a) only (B) (b), (c) and (d) (C) (a) and (d) (D) All of these 39. Which among the following is an odd one ? (A) Desert : Stems store water (B) Pond : Animals with streamlined bodies (C) High altitude : Increase in RBC (D) Rainforests : Camouflage to escape from enemies 40. Which of the following encloses the portion of your body below the stomach ? (A) (B) (C) (D) 41. Charkha is used for ______. (A) Spinning (B) Ginning (C) Weaving (D) Knitting 42. "Fats are stored beneath the skin and around the heart and kidneys". It is because _______. (A) When we are short of energy, our body uses stored fats (B) The stored fats in our body help to keep us warm (C) Fats act as shock absorber and protect internal organs from injury (D) All of these 43. Select the correct pair. (A) Spinach – Leaves (B) Carrot – Stem (C) Cauliflower – Roots (D) Onion – Flowers 44. The function of scissors is synonymous with the function of _____. (A) Incisors (B) Premolars (C) Canines (D) Molars 45. Match Column-I with Column-II and select the correct option from the codes given below. Column-I Column-II (a) Salivary gland (i) Breaks down fats (b) Intestinal gland (ii) Breaks down proteins into peptides (c) Pancreas (iii) Breaks down peptides into amino acids (d) Liver (iv) Breaks down starch into sugar (A) (a)-(iv), (b)-(iii), (c)-(ii), (d)-(i) (B) (a)-(i), (b)-(ii), (c)-(iii), (d)-(iv) (C) (a)-(ii), (b)-(iii), (c)-(i), (d)-(iv) (D) (a)-(iv), (b)-(ii), (c)-(iii), (d)-(i) 46.2 Which of the following is incorrect regarding exhalation process in breathing mechanism ? (A) Air moves out. (B) Diaphragm relaxes. (C) Chest cavity becomes smaller. (D) External intercostal muscles contract. 15th NSO - SET A 8 47.2 Garima took a plant and placed it in the dark for 24 hours to de-starch its leaves. After that she performed an activity as shown here. (i) She put one leaf (marked as X) in clean plastic bag containing soda lime and another leaf (marked as Y) in a clean plastic bag containing water. Then she left the plant in sunlight for 6 hours. (ii) She took out the leaves and boiled them in alcohol. (iii) She performed the iodine test on the leaves. Select the option with correct iodine test results and the conclusions of the activity. Leaf X CO2 is necessary Leaf Y CO2 is necessary (Iodine test) for photosynthesis (Iodine test) for photosynthesis (A)  Yes  No (B)  Yes  Yes (C)  No  Yes (D)  No  No 48. 'Silk has come under fire from animal rights activists'. Why ? (A) Because female silkmoth is reared to lay hundreds of eggs at a time. (B) It takes approximately 630 cocoons to make a silk blouse. (C) Cocoons are collected and put into very hot water, killing the silkworm inside them. (D) After hatching, the silkworms are fed on mulberry leaves continuously for six weeks. 49. Sandeep has three soil samples X, Y and Z, each with weight 50 g. 100 mL of water is poured drop by drop with the help of a dropper on all the soil samples. The given graph shows weight of water absorbed by each soil sample. Select the correct option regarding the soil samples. (A) X is a mixture of sand, silt and a good amount of clay. (B) Y is a mixture of sand, silt and appropriate amount of clay. (C) Z is a sandy soil with very little clay. (D) Z is a mixture of clay and silt with higher amount of sand. 50. The given figure shows _____. (A) Seed dispersal carried out by explosion (B) Seed dispersal carried out by wind (C) Seed dispersal carried out by insect (D) Seed dispersal carried out by sunlight SPACE FOR ROUGH WORK Class 7 15th Set B Year 2012 15th NSO - SET B 1 MENTAL ABILITY 1. Which of the following statements is INCORRECT? (A) All integers and fractions are called rational numbers. (B) The number 0 is neither a positive nor a negative rational number. (C) There are limited number of rational numbers between two rational numbers. p (D) A number that can be expressed in the form , where p and q are integers and q ≠ 0 is called a rational q number. 2. Aman rotated a game piece 270° clockwise around vertex V. Which of the following represents the position of the game piece after the 270­° clockwise rotation? (A) (B) (C) (D) 3. Lengths of some world's longest snakes are 9, 9, 4.3, 6, 6.5, 2.6, 5.6, 9. The range, in metres, of the lengths is _____. (A) 6.25 (B) 6.4 (C) 6.5 (D) 9 4. Solve for x : x + 3 − x + 4 = x + 5 − x + 6 4 5 6 7 (A) –1 (B) 1 (C) 0 (D) 2 5. Amit, Raj, Kunal, Harsh and Armaan used different types of transport during the holidays. I. Everyone except Harsh travelled on the bus. II. Kunal, Harsh and Armaan all went on an aeroplane. III. Everyone except Raj went in a taxi. IV. Amit and Harsh both had a ride on a tram. V. Raj travelled on a bus and then a train to get to his holiday destination. Who used the fewest types of transport during the holidays? (A) Amit (B) Raj (C) Harsh (D) Armaan 6. The least number which when increased by 5 is divisible by each one of 24, 32, 36 and 54, is ____. (A) 427 (B) 859 (C) 869 (D) 4320 7. The given table shows a relationship between x and y. x y The equation which is true for each of the ordered pairs in the table is ____. 0 2 (A) y = 3x + 2 2 9 (B) y = 2.5x + 6 4 16 (C) y = 3.5x + 2 6 23 (D) y = 3x + 6 8 30 8. The records of a sporting goods company shows that 4 out of every 100 footballs manufactured have some defect. The probability of drawing a football that will NOT have a manufacturing defect is ______. 1 1 1 24 (A) (B) (C) (D) 1 4 25 25 9. 60% of the population of city were men and the rests were women. Afterwards, 840 men left the city and 1000 women came to the city. As a result, the percentage of the men reduced to 56% of the population. The present population of the city is _____. (A) 23420 (B) 24300 (C) 23240 (D) 23400 15th NSO - SET B 2 10. In the problem set, given below three figures are similar in a certain manner. However, one figure is not like the other three. Choose the figure which is different from the rest. (A) (B) (C) (D) th 3 11. In what time will the interest on a certain sum of money become   of the amount at the rate 8 of 6% p.a. simple interest? (A) 5 years (B) 10 years (C) 8 years (D) 6 years 1 1 4 12. If 8 − 4 + 2.8 + − 2.32 = 5.33 , then x is _____. 4 5 x (A) 0.05 (B) 0.5 (C) 5 (D) None of these 13. Select the figure which is embedded in the given figure (X). (A) (B) (C) (D)  14. Which of the following numbers is divisible by 9? (A) 823519 (B) 270351 (C) 612593 (D) 759803 15. The elevator descends into a mineshaft at the rate of 8 m/min. If the descent starts from 20 m above the ground level, the time taken by the elevator to reach – 300 m is _____. (A) 30 mins (B) 40 mins (C) 50 mins (D) 1 hr SCIENCE 16. A switch is used to turn an appliance on and off. Which is the safest position for the switch ? (A) On the live wire (B) On the neutral wire (C) On the heating element (D) On the earth wire 17. Match the Column-I with Column-II and select the correct option from the codes given below. Column-I Column-II (a) Body moving with uniform speed (i) Straight line parallel to the time axis (b) Body moving with non-uniform speed (ii) A curve having increasing slope. (c) When a body is at rest (iii) Straight line inclined to the axis. (A) (a)-(iii), (b)-(ii), (c)-(i) (B) (a)-(i), (b)-(iii), (c)-(ii) (C) (a)-(ii), (b)-(i), (c)-(iii) (D) (a)-(i), (b)-(ii), (c)-(iiii) 18. When Beena compresses the spring as shown in figure, which of the following occur? (i) Her hand exerts a pushing force (ii) Her hand exerts a pulling force (iii) The spring exerts a pushing force (iv) The spring exerts a pulling force (A) (i) and (iii) only (B) (i) and (iv) only (C) (ii) and (iii) only (D) (ii) and (iv) only 15th NSO - SET B 3 19. If a pin is placed in front of, and to the right of a plane mirror as P Q R shown in figure. Where is the image of the pin formed? S (A) P (B) Q Pin (C) R (D) S Observer 20. Study the distance-time graph of a toy car, given in the figure and choose the incorrect statement from the following. (A) The toy car is fastest during first 10 seconds. (B) The toy car is slowest in between 10 and 20 seconds. (C) Distance travelled during last 10 seconds is 5 m. (D) None of these 21. Bulb does not glow when the probs are hanged in air. The reason is _______. (A) Air absorbs the electricity (B) Air is a bad conductor of electricity (C) Electricity is discharged into air (D) Air disperses the electricity 22. Which of the following cannot be turned into a magnet ? (A) Copper coil (B) Steel bar (C) Iron bar (D) Nickel disc 23. What conclusions do you draw about the nature of motion of an object from the given velocity-time graph s ? (A) In graph (a) object is moving with retardation and in graph (b) object is moving with constant acceleration. (B) In graph (a) object is moving with retardation and in graph (b) object is moving with variable acceleration. (C) In graph (a) object is moving with positive acceleration and in graph (b) object is moving with variable acceleration. (D) In graph (a) object is moving with positive acceleration and in graph (b) object is moving with constant acceleration. 24. Mohan takes 15 minutes to go from his home to school and 30 minutes for the return journey. If the distance between the school and the home is 4.5 km, what is his average velocity? (A) 0 (B) 5 m s–1 (C) 4 m s–1 (D) 3 m s–1 25. The factor which contribute to the development of cyclones is/are (i) Wind speed (ii) Temperature (iii) Humidity (A) (i) only (B) (ii) and (iii) only (C) (i) and (iiii) only (D) All of these 26. Four rods of equal length and thickness but of different materials are coated with wax in the same manner. They Aluminium rod are fixed to a trough containing hot water. The given Hot water Brass rod Copper rod diagram illustrates what happens to the wax on each rod Glass rod after five minutes. Wax coating on rod Metal trough What can you conclude from the given diagram? (i) Aluminium rod can conduct heat better than the brass rod. (ii) The aluminium rod conducts heat better than the copper rod. (iii) The glass rod conducts heat better than the copper rod. (iv) The wax on the copper rod melts faster than the wax on the brass rod. (A) (i) and (iv) only (B) (ii) and (iii) only (C) (i), (ii) and (iii) only (D) (ii), (iii) and (iv) only 15th NSO - SET B 4 27. Which of the following diagram(s) represents alkalis and bases in the correct form? (A) (i) only (B) (iii) only (C) (i) and (iv) (D) (iii) and (iv) 28. The given diagram shows a bimetallic strip made of brass and steel. It is clamped at its centre. The bimetallic strip is heated. Which one of the following shows the strip after it has been heated ? Note : Brass expands more than steel upon heating. (A) (B) (C) (D) 29. A metallic piece (X) is dropped into copper sulphate solution. After some time, the blue colour of the solution changes to green which shows a chemical change has taken place. Which metal has been dropped into the solution and what is the name of the new substance formed? (A) Metal X is iron and the substance formed is ferrous sulphate. (B) Metal X is silver and the substance formed is silver sulphate. (C) Metal X is zinc and the substance formed is zinc sulphate. (D) Metal X is magnesium and the substance formed is magnesium sulphate. 30. How will you identify the given solutions if you are provided with only one indicator-methyl orange? (A) The solutions can not be identified by the help of methyl orange only. (B) Methyl orange changes to red in both acidic and neutral solutions and yellow in basic solution. (C) Methyl orange remains orange in acidic solution while changes to yellow in basic and neutral solution. (D) Methyl orange changes to red in acidic solution, yellow in basic solution and remains orange in neutral solution. 31. Study the given Venn diagram. Which group does copper belong to? (A) P (B) Q (C) R (D) S 32. Beena performed an experiment in which she took four beakers containing different amount of water at different temperatures. She added equal amount of salt into each beaker. Identify the beaker in which salt takes the shortest time to dissolve. (A) Beaker 1 (B) Beaker 2 (C) Beaker 3 (D) Beaker 4 15th NSO - SET B 5 33. The table below shows some properties of four different substances easily available in the kitchen. They are mixed together in a bowl. Substance Colour Dissolves in water Passes through fine sieve W Green No No X White No No Y White Yes No Z White Yes Yes Which of the following is the best way to separate the substances? (A) Pour water into the bowl and remove W and X. (B) Pick out the green substance and pour water into the remaining mixture. (C) Pick out the green substance to get W, pour water into the bowl to get X and heat remaining solution to get Y. (D) Pick out the green substance, put the remaining mixture into a sieve to get Z, pour water over the remaining substances in the bowl to filter X and heat the remaining solution to get Y. 34. Match Column-I with Column-II and select the correct option from the codes given below. Column-I Column-II (a) Papier maché (i) Non-biodegradable (b) Burning of wastes (ii) Vermicomposting (c) Plastic (iii) Waste management (d) Decomposing wastes using earthworm (iv) Biodegradable (e) Vegetable peels (v) Incineration. (A) (a)-(v), (b)-(iii), c-(i), (d)-(ii), (e)-(iv) (B) (a)-(iii), (b)-(v), c-(i), (d)-(ii), (e)-(iv) (C) (a)-(ii), (b)-(iii), c-(iv), (d)-(v), (e)-(i) (D) (a)-(i), (b)-(ii), c-(iv), (d)-(v), (e)-(iii) 35. Three species of fishes X, Y and Z with different body – – – – – – – – – – – – – – – – – – – – – – – – – – – – patterns are found in a lake. A predator who feeds on all – – – – – – – – – – – – – – – – X the three fishes X, Y and Z, is introduced into the river. – – – – – – – – – – – – – – – – Which of these fishes will be least affected? – – – – – – – – – – – – – – – – Y (A) Fish Z because it lives near the ground. – – – – – – – – – – – – – – – – – – – – – – – – – – – – (B) Fish Y because it shows camouflage. – – – – – – – – – – – – – – – – – – – – Z (C) Fish X because it lives near surface. (D) All the three fishes will be equally affected. Aquatic weeds 36. Select the option which on reshuffling gives the term used for the process of separating jute fibres. (A) GGNINI (B) GCRDIAN (C) GINIPNNS (D) GETINTR 37. Saurabh's younger brother Harshit is 3 years old. He is having difficulty in walking due to deformity in his legs as shown. He always complains about body pain. Which of the following can be the reason for it? (A) His diet is deficient in vitamin C and K due to which his body absorbs excess amount of calcium and phosphorus present in food. (B) His diet is deficient in vitamin D due to which his body is not able to absorb sufficient amount of calcium and phosphorus present in food. (C) Major part of his diet is milk and green vegetables. (D) None of these 38. Which of the following joints allows the maximum freedom of movement? (A) Hinge joint (B) Gliding joint (C) Saddle joint (D) Ball and socket joint 39. Earthworms are generally seen wriggling above the ground during heavy rains, because they (A) Cannot tolerate dry environment and come out of hibernation only when it is raining. (B) Do not intake water so they come out to absorb as much water as possible and conserve it. (C) Respire air present between soil particles which is replaced by water during rain, hence earthworms come out to get air. (D) Both (A) and (C) 15th NSO - SET B 6 40. Read the given statements. (i) Air dissolved in water cannot be removed from it. (ii) Density of air decreases with increasing altitude. (iii) Air is an element that surrounds the earth and makes earth hospitable for living organisms. (iv) Air helps in pollination of several flowers and in the dispersal of seeds. Which of the above statements are correct? (A) (i) and (ii) (B) (ii) and (iv) (C) (i) and (iii) (D) (iii) and (iv) 41. For survival of a plant it is essential that all its parts get the following substances: P - Carbon dioxide Q - Oxygen R - Sugar S - Water Which of these substances is transported along the pathway shown in the figure? (A) P and Q (B) Q and R (C) Q, R and S (D) P, Q and R 42. Read the given statements and select the correct option. Statement 1 : Plants serve as the ultimate food source for all the organisms whether herbivores or carnivores. Statement 2 : Plants use solar energy to prepare their own food. (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) Both statements 1 and 2 are false. 43. Read the given statements. (a) Carnivores are called ______ consumers because they get their food ______ from plants. (b) Fungi and other microorganisms feed on dead matter and ______ the nutrients into soil through process called ______. (c) Organisms living in very cold environment have deposition of ______ under their skin and are of ______ size. (d) In submerged aquatic plants, stomata are generally ______ and roots are ______ developed. Select the option which correctly fills the blanks in any two of these statements. (A) (a) - Primary, Directly; (c) - Fat, Large (B) (b) - Release, Decomposition; (c) - Carbohydrates, Large (C) (a) - Secondary, Indirectly; (d) - Absent, Less (D) (b) - Release, Decomposition; (d) - Present, Much 44. Refer the given Venn diagram and select the correct option. (A) P - Man (B) Q - Earthworm (C) R - Cockroach (D) P - Frog 45. Surabhi is practising hard to win the inter-school marathon. One day her instructor measured and recorded the number of her heart beats during her training session in which she did some warm up exercises and her run. He plotted his recordings in the graph as shown. Select the correct option regarding this. (A) 'a' is the point when she started warm up exercises. (B) 'b' is the point when she started running. (C) 'c' is the point when she started running. (D) 'd' is the point when she stopped running. 15th NSO - SET B 7 46. Which of the following is correct about excretion in plants? (A) Production of rubber, resin, etc., is a means of excretion for plants. (B) Transpiration helps plants to get rid of excess water. (C) Withering leaves accumulate excretory wastes. (D) All of these 47. A fertile agricultural soil appears dark coloured at the surface as compared to soil one metre down. The reason for dark colour of top soil is (A) More moisture (B) Rich inorganic matter and abundance of minerals (C) Rich organic matter (D) Recent soil formation 48. Read the given statements and select the correct option. Statement 1 : Forests prevent soil erosion. Statement 2 : Canopy formed by crown of leaves of forest trees reduces the force and speed of raindrops. (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) Both statements 1 and 2 are false. 49. Anushka bagged four different kinds of flowers on the potted plants as represented by given figure and left them as such. Which of these four flowers is most likely to produce fruits and seeds? (A) (B) (C) (D) 50. Tanmay took a potted plant and covered one of its leaves entirely with black paper and marked it as X and left the plant Leaf Y in sunlight for 6 hours. After 6 hours, he plucked three leaves X, Y and Z. He immersed leaves X and Z immediately in water but smeared leaf Y with petroleum jelly prior to immersion. Leaf Z Bubbles were seen on the surfaces of leaves X, Y and not on Black leaf Z. Which of the following is most likely the reason for it? paper (A) Bubbles on leaf Z are of oxygen, produced in photosynthesis. Leaf X (B) Bubbles on leaf X are of carbon dioxide, produced in respiration. (C) Stomata on leaf Y are blocked with petroleum layer, thus oxygen cannot come out from leaf. (D) All of these SPACE FOR ROUGH WORK Class 7 16th Set A Year 2013 Mental Ability 1. Which property holds in the given below statement? 6. On which number line dark portion represents the a × (b + c) = (a × b) + (a × c) sum 3 + 1 . A. Property of division 8 2 B. Multiplicative identity of multiplication A. C. Distributive property of multiplication distributes over addition B. D. Distributive property of addition distributes over C. multiplication D. 2. ABCD is a rectangle, E is the mid-point of AB and F is the mid-point of DC. What percentage of the rectangle is unshaded? 7. Select the wrong step in the simplification of 24 – [2.4 – {0.24 × 2 – (0.024 – x)}] = 22.0584 A. 50% (i) 24 – [2.4 – {0.24 × 2 – (0.024 – x)}] = 22.0584 B. 25% (ii) 24 – [2.4 – {0.48 – 0.024 – x}] = 22.0584 C. 15% (iii) 24 – [2.4 – 0.456 – x] = 22.0584 D. 75% (iv) 24 – 1.944 + x = 22.0584 3. Select the correct match. (v) x = 22.0584 – 22.056 = 0.0024 Solid Net A. Both (ii) and (iii) B. Only (ii) C. Only (v) D. Both (iii) and (iv) A. 8. The given table shows the weights of some marbles. Marbles A A B A B B B. Weight in grams 500 400 What is the average weight of marbles A and B? C. A. 450 grams B. 150 grams C. 300 grams D. 600 grams 9. Which is the missing figure? D. 4. Find the value of (21001 – 21000) ÷ (2501 – 2500). A. 22000 B. 2500 C. 21000 A. B. D. 2200 5. In the given figure (not C. D. drawn to scale), ABCD is a parallelogram and 10. What is the missing number? GBEF is a rectangle. Find x – y. A. 36 A. 7° B. 125 B. 8° C. 343 C. 6° D. 9° D. 512 16th NSO - SET A 2 11. A cube has faces numbered 1, 2, 3, 4, 5 and 6. The 13. The clock shows 9 O' clock. What time will it numbers on the opposite faces of the cube add up to 3 show, if the hour hand makes a - turn in the 7. The net of the cube is shown below. The numbers 4 anti-clockwise direction and minute hand do not on 3 faces are not shown. Find the number on the change its position? face indicated by the ‘?’ A. 12 : 15 A. 6 B. 12 : 00 B. 4 C. 3 : 00 C. 2 D. 3 : 15 D. 5 14. and are whole numbers and 12. Select the correct mirror image of given below figure (X). × = 48. What is the smallest possible value of + ? A. 20 B. 12 C. 14 D. 16 A. 15. When two lines intersect each other at a common point, this common point is called the ______. But B. when three or more lines pass through a single common point, then this point is called the ______ of the lines. A. Point of concurrency, same point C. B. Unique point, point of concurrency C. Point of intersection of the lines, point of concurrency D. D. Point of intersection of the lines, point of collinearity Science 16. An object start moving in a circular path of radius 18. The hot liquid is poured into a test tube. The figure R, from point A. The magnitude of displacement of shows how the temperature of the contents of the the object, when it reaches point B is test tube changes with time what is the physical state of the contents of the tube at time 8 minute? A. pR A A. Mixture of liquid B. 2R R B and vapour O B. Mixture of liquid C. 2 πR and solid πR C. Liquid D. 2 D. Solid 17. A battery lights up all the four lamps as shown in 19. The images of clouds and trees in water are always figure. When one of the lamp filament melts, the less bright than in reality, it is because other three lamps stay on. Which of the following A. Water is making the image dirty. lamp filaments melt? B. There is an optical illusion due to which the image A. P appears to be less bright. P C. Only a portion of the incident light is reflected and B. Q quite a large portion goes mid water. Q C. R R D. Air above the surface of water contains a lot of moisture. D. S S 16th NSO - SET A 3 20. Three bulbs X, Y and Z are connected in a circuit as shown in figure. When the switch is put on, then C. D. 25. Ranjana was given three unknown solutions P, Q and R. She performed certain tests and observed the A. All the bulbs will glow at the same time following: B. Bulbs will glow in the order of X, Y and Z Solution P → gives green colour with China rose C. Bulb X will glow first whereas bulbs Y and Z will indicator. glow simultaneously after some time Solution Q → phenolphthalein remains colourless. D. Bulb Z will glow first Solution R + sugar solution → turns methyl orange to yellow. 21. Following are the precautions one must take in the case a storm is accompanied by lightning. Which Identify the solutions P, Q and R respectively. one of the following statements is not correct? A. Orange juice, Salt solution, Baking soda A. Do not take shelter under a tall tree. B. Soap solution, Lime water, Lemon juice B. Do not take shelter inside a closed car. C. Soda water, Vinegar solution, Shampoo C. Do not take shelter under an umbrella. D. Salt solution, Milk of magnesia, Antacid D. Do not take shelter under an open garage. 26. Methods of separation depend on the nature of the 22. A pendulum is oscillating as shown in the figure. If constituents in a mixture. Study the methods of it takes 0.4 s to swing from A to B, then how long separation as given below. will it take to make 5 oscillations ? Types of mixture Methods of separation A. 1.6 s 1. Solid - Solid Handpicking, Sieving B. 3.2 s C. 8.0 s 2. Solid - Liquid Sedimentation, D. 4.2 s A B C (insoluble) Decantation, Filtration 23. Match the column I with column II. 3. Liquid - Liquid Decantation, Separating Column I Column II (immiscible) funnel (a) Convex mirror (i) used as magnifying glass 4. Solid - Liquid Filtration, Decantation (b) Convex lens (ii) used as side view (soluble) mirror in vehicles 5. Liquid - Liquid Distillation (c) Concave mirror (iii) image is erect and (miscible) smaller than object (d) Concave lens (iv) used by dentists to see enlarged image Which of these is incorrect method of separation? A. 1 and 2 A. a-(i), b-(iii), c-(iv), d-(ii) B. 5 B. a-(iv), b-(ii), c-(iii), d-(i) C. 1 and 5 C. a-(ii), b-(i), c-(iv), d-(iii) D. 4 D. a-(iii), b-(iv), c-(ii), d-(i) 27. Ankit, Sahil and Manish living in different parts of 24. Which of the following speed-time graphs represents the country bought new bicycles on the same day. the case of a body first decelerating then moving Ankit lives near sea coast. Sahil lives in a city with with a constant speed and finally accelerating ? cool and moist climate whereas Manish lives near desert. After two years, whose bicycle will be in the A. B. worst condition due to rusting? A. Ankit B. Sahil C. Manish D. Ankit and Manish 16th NSO - SET A 4 28. Rishab was performing an experiment with a blue S : Took ice cold water and added more water. coloured solution (X ) in a beaker. By mistake a Whom do you think would win the game? shaving blade fell into the beaker. After half an hour, A. P he found that the colour of the solution in beaker B. Q changed to green (Y ). What could be the solutions C. R X and Y respectively? D. S 32. Consider the following four adaptations and select the ones required for animals to survive in tropical rain-forests. (i) Living on the trees, development of strong tails. (ii) Burrowing in soil to escape high tempera- ture. (iii) Sensitive hearing, sharp eyesight, thick skin, A. Copper sulphate, Iron sulphate ability to camouflage. B. Iron sulphate, Copper sulphate (iv) Bask in Sun when temperature is low. C. Iron sulphate, Zinc sulphate A. (i) and (iv) D. Copper sulphate, Zinc sulphate B. (ii) and (iv) C. (i) and (iii) 29. Each cell in our body contains a/an ______ the DNA, D. (ii) and (iii) which controls every feature of the body such as our looks, complexion, etc. Proteins that build part 33. Which one of the following is a possibility for most of our cells are made of _______. The fats in our of us in regard to breathing, by making a conscious body contain _______. effort? A. Neutral, bases, acids A. The lungs can be made fully empty by forcefully B. Acid, amino acids, fatty acids breathing out all air from them. C. Base, nutrients, neutral substances B. One can breathe out air through Eustachian tube by closing both nose and mouth. D. Amino acid, zinc carbonate, formic acid C. One can consciously breathe in and breathe 30. Study the given figures carefully. out by moving the diaphragm alone, without moving the ribs at all. D. One can breathe out air totally without oxygen. 34. Root hairs are most important to a plant because they _________. A. Anchor a plant to the soil What type of changes occurred in the wire? B. Provide a habitat for N 2 fixing bacteria A. I is a chemical change while II is a physical C. Increase the surface area for absorption change. D. Contain xylem tissue. B. I is a physical change while II is a chemical 35. When domestic sewage mixes with river water change. ______. C. Both I and II are physical changes. A. Small animals like rats will die after drinking D. Both I and II are chemical changes. river water. 31. Four students P, Q, R and S have to dissolve maximum B. T h e p o p u l a t i o n o f m i c r o b e s i n c r e a s e s amount of sugar in the same amount of water so as and concentration of dissolved oxygen to win in a game. decreases. P : Took hot boiling water. C. The river water is still suitable for drinking as impurities are only about 0.1%. Q : Took ice cold water. R : Added more water on dissolving sugar in hot D. The increased microbial activity releases micronutrients such as iron. water. 16th NSO - SET A 5 36. The given figures show two kinds of fruits : P : It stores food for the developing embryo. Q : It is called the 'poor man's protein'. R : It can grow into new plant. S : It absorbs water from the soil. T : It holds the plant firmly in the ground. A. P and R B. P, Q and R C. P only D. S and T 40. Which of the following is an incorrect match? How are ‘X’ and ’Y’ adapted for their dispersal in A. Ginning – Separation of fibres from seeds the surroundings? B. Recycling – Making useful things from waste X Y C. Stratosphere – It is the coldest layer of A. Fleshy and sweet Hair-like structure to stick atmosphere onto bodies of animals B. Able to float Hook-like structure to D. Refuse – The fourth 'R' on water stick onto fur of animals 41. C. Air trapped Dry seeds within its structure D. Wing-like Hair-like structure to get structure blown off with the wind 37. In the given figure, which blood vessels represent pulmonary vein, pulmonary artery and vena cava respectively? A. P, Q and R B. Q, P and R C. P, Q and S D. Q, P and T The given figure shows the skeleton of an adult 38. A group of social workers has transformed a dry area human with some of its parts labelled. Identify the in the Rajasthan's Alwar district into a green place. incorrectly labelled parts. They have revived dried-up rivers by constructing water-harvesting structures. A. Femur and Pelvis B. Radius and Ulna C. Tibia and Fibula What are the names of those rivers? D. Radius and Humerus A. Arveri and Ruparel B. Sarsa and Bhagani C. Arveri and Jahazwali 42. Which of the following is an incorrect statement? D. All of these A. Cotton yarn shrinks away from flame and burns and smells like burning paper. 39. B. Silk has come under fire from animal right activists. C. Wool fibres have an outer layer scales that reduce X the ability of dirt and dust to penetrate the fibre. Which of the following are the functions of the part D. A spinneret is used to make nylon but is not needed marked X? to make cotton or wool fibres. 16th NSO - SET A 6 43. Which of the following is classified correctly? 45. Given below are statements about importance of A. Banana : Fibrous root : Reticulate venation minerals made by four students : B. Banyan : Tap root: Parallel venation C. Rose : Tap root : Reticulate venation D. Maize : Fibrous root : Reticulate venation 44. The given predator-prey relationships were observed among four living things P, Q, R and S. P is eaten by S. P feeds on R. S feeds on R but not Q. R gets its food from Q. Which one of the following is the correct classification of the living things? Which of the students have made incorrect Food Prey Prey/ Predator statements? producer Predator A. Ali and Swati A. Q S R P B. Ali and Lily B. Q R P S C. R Q S P C. Ali, Lily and Swati D. S R P Q D. Mohan and Swati Achievers Section 46. Which of the following options is correct for the P Q R S T object having a straight line motion represented by Blood pressure mmHg the graph shown in figure? 120 D C 80 t B 40 A O s Match the vessels given in Column-I with their A. The object moves with constantly increasing corresponding letters given in Column-II and select velocity from O to A and then it moves with the correct option. constant velocity. Column-I Column -II B. Velocity of the object increases uniformly. (a) Venules (i) P C. Average velocity is zero. (b) Capillaries (ii) T (c) Arterioles (iii) R D. The graph shown is impossible. (d) Veins (iv) Q 47. The given graph represents the pressure (systolic (e) Arteries (v) S A. a-(i), b-(iv), c-(ii), d-(iii), e-(v) and diastolic) of a volume of blood moving through B. a-(i), b-(iii), c-(v), d-(iv), e-(ii) circulatory system via different blood vessels labelled C. a-(v), b-(iii), c-(iv), d-(ii), e-(i) as P, Q, R, S and T. D. a-(ii), b-(iii), c-(iv), d-(v), e-(i) 16th NSO - SET A 7 48. Study the given set up to pass gas Z through lime solution form from dead and decaying matter, and are water. called saprotrophs. Fungi also grow on pickles, leather clothes and other articles that are left in hot and humid weather for long time. Certain fungi live in the roots of trees and share shelter and nutrients. This is called symbiotic relationship. 49. W h i c h o f t h e f o l l o w i n g s t a t e m e n t s i s / a r e incorrect? (i) Fungi are called saprotrophs because they grow on pickles, leather and clothes. (ii) Saprotrophs lack chlorophyll, so cannot make food by photosynthesis. X is ________ and Y is ________. When _________ (iii) Like some fungi, lichens also show symbiotic (Z) is passed through lime water, _________ is relationship. formed which makes lime water milky. (iv) The bacterium called Rhizobium shows symbiotic A. Hydrochloric acid, zinc carbonate, hydrogen gas, relationship as it provides shelter, water calcium hydroxide B. Vinegar, sodium carbonate, hydrogen gas, calcium and minerals to legumes and, in return, the carbonate legumes provide food which they prepare by C. Acetic acid, baking soda, carbon dioxide, calcium photosynthesis. carbonate A. (i) and (iv) B. (i) and (ii) D. Hydrochloric acid, vinegar, carbon dioxide, calcium C. (ii) and (iii) D. (iv) only hydroxide 50. Which of the following organisms shows symbiotic Direction (Q. 49 & 50) : Refer the given passage and relationship? answer the following questions. A. All fungi B. Lichens Some organisms like fungi, etc. take in nutrients in C. Rhizobium D. Both B & C SPACE FOR ROUGH WORK Class 7 16th Set B Year 2013 Mental Ability 1. Select the correct match of shaded fraction. 6. A piece of sheet is folded and cut and then unfolded 2 as shown in the figure. Select a figure which exactly A. 2´ ⇒ = resembles the unfolded paper. 5 1 B. 3´ ⇒ = 9 2 ⇒ = C. 4´ 3 1 D. 7´ ⇒ = 3 A. B. 2. In the given question, which number 2 4 0 will replace the question mark? A. 25 1 2 4 C. D. B. 59 3 1 3 C. 48 D. 73 36 ? 91 7. The average perimeter of a rectangle 42 cm × 74 cm and a square is 244 cm. What is the ratio of the 3. The figure shows a square PQRS being folded along area of rectangle to the area of square? QT such that point P touches SR at point U. Given that ∠TQU is 41°, find ∠RQU. A. 677 : 1204 B. 677 : 1024 A. 8° C. 777 : 1024 B. 7° D. 777 : 1204 C. 9° D. 11° 8. 0.63 of Mohit’s money is equal to 1.5 times Tarun’s money. If Mohit has ` 116 more than Tarun, how 4. Find the figure from the options which will continue much money does Mohit have? the series established by Problem figures. A. ` 200 B. ` 84 C. ` 190 D. ` 80 9. The line graph shows the profit made by a company from January to April. Some ink was spilled on the A. B. graph. What was the average amount of profit made by the company from January to March? C. D. 5. The ratio of the number of fiction books to non-fiction books to dictionaries was 2 : 5 : 4. After a librarian bought another 68 books of each type, the new ratio became 23 : 32 : 29. How many dictionaries were there at first? A. ` 20,667 A. 16 B. ` 31,667 B. 14 C. ` 30,667 C. 12 D. 48 D. ` 25,667 16th NSO - SET B 2 10. Sonu is taller than Sarthak. Amit is taller than Sonu. 1 1 Sahil is taller than Amit. Samir is the tallest. If they 13. If = 0.16134, then the value of 6.198 0.0006198 are arranged according to their heights, who will be is in the middle? A. 0.016134 B. 0.16134 A. Sonu C. 1613.4 D. 16134 B. Sahil C. Sarthak 14. The line graph shows the number of cakes Zarrin D. Amit sold from March to June. If Zarrin earned ` 12 for every cake sold, then how much did she earn from 1 1 11. If ✆ = and ✡ = , which one of the following March to June ? 2 4 Number of cakes sold 120 has the greatest value? A. ` 340 100 A. ✆ +✡ 80 B. ` 360 60 B. ✆ ÷✡ 40 C. ✆ ×✡ C. ` 4080 20 D. ✆ –✡ 0 D. ` 4800 March April May June 12. Count the number of cubes in the given figure? 15. Number of factors of the product of the highest A. 37 common factor of 18 and 24 and the eighth multiple B. 39 of 6 is A. 18 C. 38 B. 288 D. 35 C. 22 D. 16 Science 16. The temperature changes in a closed kettle of water B. The bulb is connected across 60 joules, 220 volts was recorded for 14 minutes and represented in the of energy is consumed. graph below. Which of the following statement is C. 60 unit of current will flow in the bulb. true? D. 220 unit of current will flow in the bulb. 18. Human eye has a converging lens system that produces an image at the back of the eye. If the eye views a distant object, which type of image is produced? A. Real, erect, same size B. Real, inverted, diminished C. Virtual, erect, diminished D. Virtual, inverted, magnified A. The kettle of water was heated for 6 minutes. 19. An electric kettle is plugged in and switched on. The B. There was less water in the kettle at point E than fuse in the plug blows immediately. Which single at point A. fault could cause this ? C. The water took 6 minutes to reach its boiling point after it was heated. A. The earth wire is not connected to the kettle. D. The water in the kettle started boiling at C. B. The line wire and neutral wire connections in the plug are swapped around. 17. Marking on a bulb is 60 W, 220 V. What does it C. The line wire touches the metal case of the signify? kettle. A. The bulb is connected across the 220 volts, 60 joules of energy is consumed for every D. The wires connected to the plug are too thin. second. 16th NSO - SET B 3 20. A point object P moves towards a convex mirror 24. Which of the following statement (s) is/are true? with a constant speed v, along its optic axis. The (I) We can find east-west direction with the help of speed of the image a magnet. A. Is always less than v (II) Copper is a magnetic material. B. Is always more than v (III) A cylindrical magnet has only one pole, either C. Is equal to v north or south pole. D. Decreases as P comes A. Only I closer to the mirror. B. Both (I) and (II) C. Only (III) 21. Two friends X and Y started from the same location D. Both (I) and (III) and went 30 km along a road in the same direction as shown in graph. Which among the following 25. Mr. Kumar forgot a water bottle in his car parked statement is correct? out on a sunny day. On the next day, when he came back and took the bottle out, he observed some water droplets on the inner surface of the empty portion of the bottle. These droplets of water were formed due to A. Saturation and evaporation B. Boiling and condensation C. Evaporation and condensation A. Both are moving with same speed. D. Condensation and saturation B. Y moves with non uniform speed. C. X completes his journey early. 26. The rocks underneath the lake located close to D. Y overtakes X at 10:10 a.m. Rahul's house are made of limestone. Which of the following are correct about the lake's water after an 22. The bulb in the circuit given here does not glow. acid rain? Which labelled part is responsible for this ? 1. It turns red litmus to blue. A. P and S 2. Neutralisation reaction occurs. B. P only 3. Phenolphthalein remains colourless A. 1 and 2 C. R only B. 1 and 3 D. S only C. 2 and 3 23. A U tube is immersed in ice water as shown in the D. 1, 2 and 3 figure. What will you observe after sometime ? 27. Read the given statements and select the correct option. Statement 1 : The ash produced from burning a magnesium ribbon is dissolved in water to get a basic solution. Statement 2 : It is a physical change as the substance formed is also composed of same elements Mg, H and O. A. Both statements 1 and 2 are true and statement 2 A. P and Q will move downwards. is the correct explanation of statement 1. B. P and Q will move upwards. B. Both statements 1 and 2 are true but statement 2 C. P will move upwards and Q will move is not the correct explanation of statement 1. downwards. C. Statement 1 is true and statement 2 is false. D. P will move downwards and Q will move D. Both statements 1 and 2 are false. upwards. 16th NSO - SET B 4 28. During a group discussion on the topic "Rusting", 33. Given below is the diagrammatic sectional view of three students, Naina, Rohit and Mehak gave the the human respiratory system. Which set of three following statements: parts out of I-VI have been correctly identified? Naina : Stainless steel rusts more quickly as it contains carbon and metals like chromium, nickel and manganese. Rohit : Salty water slows the process of rust formation IV as it contains many salts. V Mehak : Depositing a layer of iron on zinc is called VI galvanisation. III Choose the correct option. A. Rohit and Mehak are correct. B. Naina and Rohit are correct. C. Naina is correct while Rohit and Mehak are II wrong. I D. All the three are wrong. 29. I can form a separate layer on water. You use me A. (I) Bronchioles, (IV) Pharynx, (VI) Bronchus for making paper translucent. Who am I? B. (III) Bronchi, (IV) Pharynx, (VI) Trachea A. Lemon juice C. (I) Bronchioles, (II) Alveolus, (VI) Bronchus B. Honey D. (II) Alveolus, (IV) Larynx, (V) Glottis C. Mustard oil D. Sugar solution 34. Which of the following is not the correct example of structural adaptation in animals? 30. Some bags of cement were lying in the open playground of Raghu's school for the construction A. A desert fox losing excess heat through its large purpose. Due to rain at night, all the bags got wet. ear. If the sun shines brightly on next day, then what B. A monkey using its strong, long limbs and tail for type of change will Raghu observe in the cement? grasping branches. A. Seasonal change C. A polar bear balancing itself on its paws with stiff B. Reversible change hair. C. Irreversible change D. Toucan has developed sticky pads on its feet to D. Periodic change help it to reach the fruits on branches which are 31. Rima prepared an indicator paper by dipping a paper otherwise too weak to support its weight. strip in a solution of X. She put a few drops of an unknown solution Y which contains H+ ions less 35. A rare plant in a botanical garden has been infected than OH – ions on this paper. She observed that the with specific fungi that feed on sugar molecules. colour of paper changed to yellow. What do you After careful examination, a botanist suggested think was solution X? the following surgical intervention : removing the A. Red litmus solution infected portion i.e., a ring of bark about 2 inches B. Phenolphthalein in height and about 2 cms wide. This will remove C. Methyl orange the cambial cells, phloem, endodermis, cortex and D. Turmeric solution epidermis of the stem. Which of the following will be the consequence of such a surgical intervention? 32. Which one of the following is an incorrect statement? A. Flow of food downwards will be affected but flow A. Pulmonary artery carries oxygenated blood from of water upwards will be maintained. the lungs to the heart. B. Flow of water upwards will be affected but flow B. Ozone present in the troposphere is harmful to of food will be maintained. animals. C. Both the flow of food and water will be C. The seeped water collects between layers of hard affected. rocks, this is called an aquifer. D. Neither the flow of food nor the water movement D. Eutrophication is a natural phenomenon in will be affected. freshwater bodies. 16th NSO - SET B 5 36. Silk obtained from silkworm is a product of ____. 41. Refer the given flow chart. A. Skin of caterpillar Aquatic plants B. Salivary glands of silk moth C. Salivary glands of caterpillar Floating Partially Fully D. Skin of silk moth submerged submerged 37. Which of the following statements is incorrect? l Lemna l Vallisneria l Hydrilla A. Soil helps forests to grow and regenerate. l Utricularia l Water lily l Tape grass B. Forests protect the soil from erosion. l Wolffia l Sedge l Salvinia C. Forests influence the climate and water cycle. Which of the following plants are incorrectly D. Plants and animals in forest are not dependent on classified? each another. A. Utricularia, Vallisneria, Salvinia 38. Study the given diagrams showing the cross-section B. Lemna, Vallisneria, Salvinia of two flowers. Which of the following statements C. Wolffia, Water lily, Tape grass is/are correct regarding them? D. Utricularia, Water lily, Tape grass 42. Ridhima took two test tubes labelled as 1 and 2 as shown in the figure. In test tube 1, she put one table spoon of boiled rice and in test tube 2, she put one table spoon of boiled rice after chewing it for 3-5 minutes. Then she added 3-4 mL of water in both the test tubes. Thereafter, she poured 2-3 drops of (i) The flowering plants have developed from iodine solution in each of the test tubes. seeds. (ii) Flower X is a female flower and flower Y is a bisexual flower. (iii) Fertilization can take place in both flowers. A. (i) only B. (ii) only C. (i) and (iii) D. (ii) and (iii) 39. The clean and selected wool fibres are passed through rollers, which straightens the fibres and removes the unwanted matter. This process is called as ____. Which of the following would be the expected A. Shearing observation by Ridhima? B. Scouring A. Colour changes to blue-black in test tube 1 as rice C. Carding is rich in starch. D. Spinning. B. Colour changes to blue-black in test tube 2 as 40. Read the given statements and select the correct saliva breaks down the starch into sugars. C. Colour changes to blue-black in both the test option. tubes. Statement 1 : Climate is the current condition or D. Colour does not change in either of the test the state of atmosphere of a particular place in terms tubes. of humidity, cloudiness, temperature, wind, etc. Statement 2 : Weather refers to the long term (usually 43. Which one of the following pairs is correctly 25-30 years) average environmental conditions of a matched? particular place. A. Tibia and – Both form part of knee joint A. Both statements 1 and 2 are true and statement 2 Fibula is the correct explanation of statement 1. B. Crabs and – Possess exoskeleton B. Both statements 1 and 2 are true but statement 2 Cockroaches is not the correct explanation of statement 1. C. Shoulder joint – Ball and socket type of joint C. Statement 1 is true and statement 2 is false. and Elbow joint D. Both statements 1 and 2 are false. D. Vitamin D – Helps in blood clotting 16th NSO - SET B 6 44. Rehan saw a dead rat in his garden. He also spotted D. Earthworms and millipedes break down the dead some earthworms and millipedes near the rotten rat into smaller pieces to speed up the process of rat. Rehan went to school and told his teacher decomposition. that earthworms and millipedes are decomposers. 45. Which of the following is likely the reason for the His teacher told him that he is not correct because shown change in the population of mosquito larva ______. in a pond? A. Earthworms and millipedes break down the dead A. Occurrence of oil spill mosquito larva Population of rat into simpler substances over the pond B. Earthworms and millipedes break down the dead B. Fish are introduced into rat into smaller pieces for easy digestion the pond C. Most of the mosquito C. Earthworms and millipedes break down the dead No. of days larvae have changed into rat into simpler substances and return it to the soil mosquitoes as nutrients D. All of these Achievers Section 46. A cyclist starts from the centre O of a circular park 48. Which one of the following bar charts best represents of radius 1 km, reaches the edge P of the park, then the composition of nitrogen (N2), oxygen (O2) and cycles along the circumference and returns to the carbon dioxide (CO2) in inhaled and exhaled air centre along QO as shown in figure. If the round trip during breathing in human beings? takes 10 minutes, then the average speed of cyclist is Q π+4 A. km per minute 10 π+4 B. km per minute O P 20 A. π C. km per minute 4 D. p km per minute 47. Fill in the blanks by choosing the correct option. Vinegar + Baking soda P Q B. + Turns Other substances Turns China rose to phenolphthalein to X Y Q + Ca(OH)2 R + H2O C. P Q R X Y A. Sodium CO2 CaCO3 Red Pink hydrogen carbonate B. Lime water H2 CaO Colourless Green C. Sodium H2 CaO Pink Red hydrogen D. carbonate D. Magnesium CO2 CaCO3 Colourless Green hydroxide 16th NSO - SET B 7 Direction (Q. 49 & 50) : Refer the given passage and C. Organic manure leached into the lake from the answer the following questions. field A farmer is growing crop regularly in his field. He uses D. Smoke particles from the industry got settled in chemical fertilizers, pesticides, organic manures as well moist surroundings of the lake as biofertilizers. There is a huge lake nearby to his field 50. An expert agriculturist suggested the farmer to and a factory which emits smoke as a by product. minimize the use of chemical fertilizers and instead 49. A considerable increase in water pollution was noticed use biofertilizers as they have many advantages over as the farming activity intensified. The most likely chemical fertilizers. Which of the following is not reason for this could be _______. true regarding biofertilizers? A. Chemical fertilizers leached into the lake from the A. They are economical. field B. They will least pollute lake. B. Living organisms used in biofertilizers polluted C. They are renewable. the lake D. They require large set-up for their production. SPACE FOR ROUGH WORK Class 7 17th Set A Year 2014 17th NSO - SET A 2 Logical reasoning 1. Four friends M, N, O and P are playing cards. If C. R, S P faces towards North and M faces towards West, D. S, Q then who faces towards South? 7. If the digits of a watch are replaced by every alternate A. O B. N letter in alphabets starting from 12, in the reverse C. P order, i.e. 12 is replaced by A, 11 is replaced by C D. Data inadequate and so on, then at which letter would be the hour hand when it is 5:00 pm? 2. Pointing towards a man, Radhika said, "His sister A. P is my daughter's brother's mother." How is the man B. N related to Radhika? C. O A. Brother D. Q B. Father C. Uncle 8. Count the number of rectangles in the given D. Grandfather figure. A. 20 3. Select the option which will replace the question B. 18 mark in the given number series. C. 16 198, 194, 185, 169, ? A. 92 D. 14 B. 112 9. Find the mirror image of the given Figure (X), if C. 136 the mirror is placed vertically to the left. D. 144 4. Which of the following Venn diagrams represents the best relationship amongst "Men, Trees and Living Figure (X) beings"? A. B. A. B. C. D. C. D. 10. Arrange the given units in a meaningful sequence. 5. Which of the following numbers will complete the 1. Hecto 2. Centi 3. Deca 4. Kilo 5. Deci given figure? A. 1, 3, 4, 5, 2 A. 90 1 9 129 17 B. 1, 5, 3, 4, 2 B. 97 C. 2, 5, 3, 1, 4 ? 33 C. 107 D. 5, 2, 1, 4, 3 73 49 D. 117 11. Two positions of a dice are given below. Find the 6. Select a pair of figures from the options which has number at the bottom, when number 6 is at the same condition of placement of dots. top. 3 4 1 6 2 5 1 3 2 (P) (R) (S) (T) A. 1 (Q) B. 4 A. P, Q C. 5 B. Q, R D. Can't be determined 17th NSO - SET A 3 12. 121 is related to 12 in the same way as 25 is related 3 D 6 $ C 4 E 8 # N 5 F 1 A P 9 M @ K 2 B to _____. % 7 H U A. 1 A. A B. 2 B. 1 C. 6 C. F D. 7 D. % 13. A bird shooter was asked how many birds he had 15. Which of the following options will complete the in his bag. He replied that there were all sparrows pattern in Figure (X)? but six, all pigeons but six, and all ducks but six. A. How many birds did he have in all in his bag? A. 9 B. 18 B. ? C. 27 D. 36 Figure (X) C. 14. Which of the following is exactly in the middle of the 17th from the right end, and 18th from the left D. end, in the given arrangement? Science 16. A ray of light parallel to the floor strikes a plane A. P is brighter than before, but Q does not light up. mirror, which is inclined at an angle 40° as shown B. P does not light up, but Q is brighter than in figure. What is the angle of reflection? before. C. Both P and Q are brighter than before. A. 40° Incident ray Plane D. P and Q both will not light up. B. 80° mirror 20. Two magnets, P and Q attract four soft iron bars, C. 50° 40° Floor W, X, Y and Z at their poles, as shown in the given D. 90° figure. What will happen to the iron bars, when the two magnets move towards each other, and attract 17. When you heat a system, its temperature _____. each other ? A. Always increases B. Sometimes decreases C. May stay the same D. Always goes up or down, depending on the heat 18. Two boys, P and Q are running along the same path. P is 10 m ahead of Q initially. However, Q catches up with P, after running 50 m. Assuming that both A. Nothing will happen. boys are running at a constant speed, what is the B. X and Y will drop off. ratio of the speeds of P and Q? C. X and Y will repel away each other. D. W and Z will attract X and Y respectively. A. 6 : 5 B. 5 : 6 21. A laboratory thermometer gave the reading of –1°C C. 4 : 1 and 99°C when inserted into melting ice and boiling D. 4 : 5 water respectively, both at standard atmospheric pressure. What is the error when the same thermometer 19. The given figure shows a is used to measure the difference between two arbitrary circuit which contains two P temperatures? identical lamps. When the Q A. –1°C switch is closed, which of B. 1°C the following statements best describes, what happened C. 0°C to lamps P and Q? D. 2°C 17th NSO - SET A 4 22. Metal pots are often made shiny on surface outside A. Both statements 1 and 2 are true and statement 2 especially on the top and side and that makes sense is the correct explanation of statement 1. thermally because this ______. B. Both statements 1 and 2 are true but statement 2 A. Conducts heat better is not the correct explanation of statement 1. B. Radiates less energy out from the pot C. Statement 1 is true and statement 2 is false. C. Lowers the loss due to conduction D. Both statements 1 and 2 are false. D. Appreciably decreases convection losses 27. Reyansh placed three different types of glasses in 23. Komal and Kavita start at one end of a street (the front of letters as shown below : origin), run to the other end, and then head back. On the way back, Komal is ahead of Kavita. Which of WW X R the given statements is correct, regarding the distance covered and the displacement from the origin at the I II III moment? Which of the following observations is correct? A. Kavita has run a greater distance, but her A. Glass I is transparent and unclear. displacement is less than that of Komal. B. Glass I is translucent and clear. B. Kavita has run a greater distance and her displacement is greater than that of Komal. C. Glass II is opaque and frosted. C. Komal has run a greater distance, but her D. Glass III is translucent and frosted. displacement is less than that of Kavita. 28. Preeti has collected some items from her kitchen : D. Komal has run a greater distance and her i. Amla ii. Baking soda displacement is greater than that of Kavita. iii. Tamarind iv. Soap 24. During the formation of rain, when water vapours v. Lime water vi. Common salt change back to liquid in the form of rain drops, vii. Sugar _____. She classified them as acidic, basic and neutral A. Heat is absorbed substances. Which of the following classification B. Heat is released is correct? C. Heat is first absorbed, and then released Acidic Basic Neutral D. There is no exchange of heat A. (i), (ii) (iv), (vii) (iii), (v), (vi) B. (iv), (vi) (i), (ii), (iii) (v), (vii) 25. O b s e r v e t h e f o l l o w i n g e x p e r i m e n t a l s e t - u p C. (i), (iii) (ii), (v), (vi) (iv), (vii) carefully. D. (i), (iii) (ii), (iv), (v) (vi), (vii) Ice cubes 29. A science teacher arranged the following sets of Beaker Aluminium test tubes and added different indicators to the Sea water tray solutions. Test tube 10 mL 10 mL Tripod Sodium Nitric acid stand Burner hydroxide + 5 mL + 5 mL Window Identify liquid (X ) in the test tube, residue (Y ) left Spinach cleaner in the beaker, process (Z) involved. juice X Y Z (1) (2) 15 mL 1 teaspoon A. Sea water Sugar Sedimentation and decantation Potassium Curd B. Water Salt Evaporation and filtration hydroxide + 10 mL C. Sea water Salt Condensation and evaporation + 10 mL Lemon Vinegar juice D. Water Salt Evaporation and condensation (3) (4) 26. Read the given statements and select the correct She asked the students to find out the incorrect result option. from the following. Statement 1: Acid rain causes damage to buildings, A. Test tubes 1 and 3 turn turmeric solution to red. historical monuments, plants and animals. B. Test tubes 2 and 4 turn China rose indicator to Statement 2: Air pollutants such as carbon dioxide, green. sulphur dioxide and nitrogen dioxide dissolve in rain C. Methyl orange turns yellow in test tubes 1 and 3. drops to form carbonic acid, sulphuric acid and nitric D. Phenolphthalein remains colourless in test tubes acid respectively. 2 and 4. 17th NSO - SET A 5 30. Some examples of changes are given below : 33. Read the given passage. a. Cutting a log of wood into pieces. The water-bearing layer of the earth called P is b. Breaking down of ozone. made up of two components Q and R . The top c. Melting of glaciers. level of layer P is called S . When too many d. Lime water turns milky. tubewells are used in an area, the level of S in e. Digestion of food. that area goes down. f. Punching a hole in a paper. Select the correct sequence of words to fill up the Classify the above changes into blanks in the above passage. I. Irreversible physical change II. Chemical change P Q R S III. Reversible physical change A. Sea Permeable Soil Aquifer A. I - a, f II - b, d, e III - c rocks B. I - a, b, e II - d, f III - c B. Water Soil Permeable Aquifer C. I - a II - b, d III - c, e, f table rocks D. I - f II - c, e III - a, b, d C. Lake Permeable Soil Water rocks table 31. 50 mL of water at 25°C was poured into each of D. Aquifer Soil Permeable Water the three containers as shown in the given figure. rocks table The containers were then left in a closed room. Direction : Read the given passage carefully and answer Q. No. 34 and 35. The phenomenon in which a bird or other animal moves (I) (II) (III) from one place to another in one season, and returns again Which of the following graphs correctly shows in a different season is called migration. It is an adaptation the volume of water in each container after five to escape the harsh conditions of their normal habitat so hours? as to survive. I Volume of water Volume of water II I A. III B. 34. The (i) flies from its native place in Russia to places like III II (ii) in Rajasthan and (iii) in Haryana during a particular season. It stays in India for a few months Time Time and then goes back in (iv) season. The general name I given to birds like these is (v) birds. Volume of water Volume of water C. D. II Select the correct sequence of words to fill up the I III blanks in the above passage. III II (i) (ii) (iii) (iv) (v) Time Time A. Toucan Sultanpur Bharatpur Autumn Adaptatory B. Siberian Bharatpur Sultanpur Winter Migratory 32. Which of the following statements is/are true (T) or crane false (F) regarding nutrition in organisms? C. Arctic Bharatpur Sultanpur Spring Migratory (i) Photosynthesis also occurs in leaves having tern colour other than green. D. Siberian Sultanpur Bharatpur Summer Adaptatory (ii) The process of photosynthesis first produces a crane simple carbohydrate called glucose which then 35. Which of the following is the probable method these gets converted into a complex carbohydrate migratory birds use to travel to the same place year called starch. after year? (iii) Cuscuta is a yellow-coloured plant but it can A. They have built-in sense of direction and probably synthesize its own food by photosynthesis. use land-marks to guide themselves. (iv) In a symbiotic association, Rhizobium bacteria B. They are guided by the position of the sun derive their nutrition from fungus. during the day and by the position of stars at (i) (ii) (iii) (iv) night. A. F T T T C. They use the magnetic field of earth to find the B. T T T F direction so as to reach the same place. C. F F F T D. All of these D. T T F F 17th NSO - SET A 6 36. A teacher showed the following plants to students and 39. Which of the following asked them to write their methods of reproduction. statements best describe the organism growing on the given piece of bread? (i) It belongs to flowering plants. (ii) It reproduces by spores. (iii) It is a chlorophyllous organism. (iv) It prepares its own food. W X Y Z (v) It obtains food from dead and decaying Given below are answers written by the students : organic matter. Student P : W, X and Y propagate vegetatively A. (ii), (iii) and (iv) B. (i), (ii) and (v) through stem. C. (ii) and (v) D. (iii) and (iv) Student Q : W and X are rhizomes which propagate 40. The given diagram shows blood Q R vegetatively through roots. circulation pathway in the heart. P S Student R : Z is called bulbil which propagates Which of the following correctly vegetatively through stem. shows the relative amount of Student S : Y vegetatively propagates through oxygen and carbon dioxide at P, roots. Q, R and S? Which student(s) wrote the correct answer? More CO2 More O2 A. Students P and S A. R P, Q, S B. Only Student S B. Q and R P and S C. Students Q and R C. S R D. Only Student Q D P and Q R and S 37. Refer to the given flow chart showing the characteristics 41. Which of the following statements are correct regarding P, Q and R which are present in some animals and the given animals? absent in others. X Y (i) Both X and Y possess streamlined body and webbed feet. Identify P, Q, R and select the correct option. (ii) Both are good swimmers. P Q R (iii) Y has a thick layer of fat under its skin with fur A. Diaphragm Book lungs Operculum on its body, while X has thick skin and a layer B. Throat Spiracles Book lungs of fat under its skin. C. Lungs Book lungs Spiracles (iv) Both live together in large numbers and huddle D. Diaphragm Operculum Spiracles together to keep themselves warm. 38. Match column I with column II and select the correct (v) Y has very strong sense of smell unlike X. option from the codes given below. A. (ii), (iii) and (iv) Column - I Column - II B. (i), (ii), (iii) and (iv) C. (ii), (iii) and (v) (a) Clothing material (i) Nylon D. (i) and (iv) (b) Twisted fibre (ii) Fabric (c) Synthetic fibre (iii) Yarn 42. Jayesh placed 3 potted plants in an airtight glass tank (d) Animal fibre (iv) Cotton as shown in the given diagram. (e) Plant fibre (v) Silk Airtight glass tank A. (a) - (i), (b) - (ii), (c) - (iii), (d) - (iv), (e) - (v) B. (a) - (ii), (b) - (iii), (c) - (v), (d) - (i), (e) - (iv) C. (a) - (ii), (b) - (iii), (c) - (i), (d) - (v), (e) - (iv) Limewater D. (a) - (i), (b) - (iv), (c) - (iii), (d) - (ii), (e) - (v) 17th NSO - SET A 7 If he placed the set-up in a dark cupboard for a few P – meat, fish, eggs hours, what would happen to the limewater, after a Q – butter, ghee, margarine few hours? R – bread, biscuits, potatoes A. It would turn dark blue. S – amla, tomato, orange B. There would be slightly less limewater left. Select the incorrect statement regarding them. C. It would turn milky. A. Deficiency of P causes Marasmus in children and D. There would be no change. Kwashiorkor only in adults. B. Amongst P, Q, R and S, 1 gram of Q produces the 43. Refer to the given figures and answer the question maximum energy. that follows. C. Excess of R gets stored in body cells, and is used Z for production of energy, whenever required. D. Deficiency of S leads to a disease, in which gums Y swell up and bleed. X 45. Study the given diagram carefully. A pump containing 3 50 cm of air is connected to What are the main functions of X, Y and Z? the glass jar. The capacity Plunger 3 X Y Z of the jar is 200 cm and it Pump 3 A. Supports the Transports Gaseous contains 200 cm of air. 50 cm3 of air plant food exchange The plunger is pushed all the B. Transports water Transports Release water way into the pump and all the and minerals food vapour air from the pump goes into the C. Transports water Supports the Take in CO2 jar. What will be the volume and minerals plant of air in the jar now? Jar D. Transports food Transports water Gaseous 3 A. 250 cm 200 cm3 of air and minerals exchange 3 B. 200 cm 3 44. Given below are the four food components (P-S) and C. 50 cm their corresponding sources. D. Cannot be calculated Achievers Section 46. A fish sees the face of a scuba diver through a thin b , or by depositing a layer of a metal like c bubble, as shown in figure. Compared to the face of on iron. the diver, the image seen by the fish will be _____. x y z a b c A. Mg O2 MgO low water copper B. Ca CO2 CaCO3 high oil magnesium C. Fe O2 & H2O Fe2O3 high grease chromium D. Fe H2O & O2 FeO low paint zinc 48. A leaf litter community has woodlice as primary A. Smaller and erect consumers and centipedes and millipedes as secondary B. Smaller and inverted consumers. The given graph shows the changes in C. Larger and erect the population of woodlice over a period of time. D. Cannot predict Which of the following is the incorrect possibility, 47. Fill in the blanks by observing the following chemical as per given graph? process. The above process becomes faster when humidity is a and can be prevented by applying a coat of 17th NSO - SET A 8 A. The number of centipedes in the habitat increases (iv) X and Z show pollination that will result in at point X. fruit formation. B. There is an increase in the quantity of dead leaves (v) W, X and Y show cross pollination. in the habitat at point Z. Which of the given statements are true or false? C. The number of millipedes in the habitat decreases A. (i) and (iv) are true; (ii), (iii) and (v) are false. at point X. B. Only (v) is true; rest are false. D. There is a shortage in the quantity of dead leaves C. (i), (ii), (iii) and (v) are true; (iv) alone is false. in the habitat at point X. D. (i), (ii) and (v) are false; (iii) and (iv) are true. 49. X W 50. Refer to the given graph which shows the effect of Z U pH on the activities of three enzymes, X, Y and Z. Y X Y Z Rate of reaction The given figure shows the longitudinal section of two flowers of the same type. Study the following statements with reference to the given figure. 2 4 6 8 10 12 (i) Z and U show self pollination, whereas Y shows pH cross pollination. The three enzyme samples, X, Y and Z are taken (ii) W, X and Z show transfer of pollen grains that from which parts of the human alimentary canal? X Y Z will result in fruit formation. A. Duodenum Mouth Stomach (iii) Z shows self pollination, while X shows cross B. Mouth Stomach Duodenum pollination. C. Stomach Duodenum Mouth D. Stomach Mouth Duodenum SPACE FOR ROUGH WORK Class 7 17th Set B Year 2014 17th NSO - SET B 2 Logical Reasoning 1. Which would be the ascending order of the 6. Select a figure from the options, which when placed following? in the blank space of Fig. (X) would complete the 1. Trillion 2. Thousand pattern. 3. Billion 4. Hundred 5. Million A. A. 1, 2, 3, 4, 5 B. 1, 5, 3, 2, 4 C. 4, 2, 3, 5, 1 D. 4, 2, 5, 3, 1 ? B. 2. If the days of the week are replaced by every alternate letter of the English alphabet, with Wednesday Fig. (X) replaced by E, Thursday by G and so on, then fifth C. day beginning from Friday will be shown by which of the following ? A. E B. I D. C. O D. Q 3. A set of figures carrying certain characters is given. 7. Study the Venn diagram carefully and answer the Assuming that the characters in each set follows a question given below. similar pattern, find the missing character. Employed people 8 6 3 1 15 5 5 15 7 ? Backward people 11 3 6 4 1 6 4 9 7 17 5 Educated people 7 A. 5 B. 6 Which region represents the backward uneducated C. 4 D. 3 people those are employed? A. 14 B. 5 4. Three of the following four are alike in a certain way C. 7 D. 11 and hence form a group. Which is the one that does not belong to that group? 8. Find the mirror image of the Fig. (X), if the mirror A. 1331 B. 2197 is placed vertically to the right. C. 3375 D. 4913 A. 5. Ashu, Bindu and Sonu are standing at the corners of an equilateral triangle as shown in figure. They all Fig. (X) run along the sides in clockwise direction and stops B. after covering 1½ sides. Now which of the following statements is true? Ashu C. N D. W E Bindu S Sonu 9. A man, pointing to a photograph, says, "The lady in the photograph is my nephew's maternal grandmother." A. Bindu is to the west of Sonu. How is the lady in the photograph related to the man's B. Ashu is to the south-east of Bindu. sister who has no other sister? C. Ashu is to the south-west of Sonu. A. Sister-in-law B. Mother-in-law D. Sonu is to the north-west of Ashu. C. Mother D. Data inadequate 17th NSO - SET B 3 10. How many cubes are there in the pile? 14. Which of the following figures will continue the given series ? A. 95 B. 114 ? C. 100 D. 115 A. B. 11. At the end of a business conference, all the ten people present shake hands with each other once. How many handshakes will there be altogether? A. 20 B. 45 C. D. C. 55 D. 90 12. If the alphabets are written in reverse order after 15. Select a figure from the options in which Fig. (X) interchanging alphabets from 'C to M' with those is exactly embedded as one of its part. from 'P to Z' respectively, which letter would be midway between E and S in the new order ? A. Z B. Y C. N D. X Fig. (X) 13. How many triangles are there in the given figure? A. B. A. 21 B. 23 C. 25 C. D. D. 22 Science 16. The diagram shows 18. The given diagram shows a series of images of a the velocity against moving ball captured by a camera. time graph for 15 m the motion of a body. What is its Direction of moving ball displacement in the first 5 s? The ball was moving at a constant velocity and the A. 11 m images were taken at a constant rate of 10 per second. B. 13 m What is the speed of the ball? C. 7.5 m A. 30 m s–1 B. 20 m s–1 –1 C. 45 m s D. 15 m s–1 D. 9 m 17. The melting point of a substance is 125°C, and its 19. A camera makes use of a converging lens to produce an image. If the camera captures a distant object, boiling point is 305°C. At 105°C, the substance is in then which of the following sets of characteristics the ________ . of image is correct? A. Solid state A. Virtual, inverted, same size B. Liquid state B. Real, inverted, diminished C. Gaseous state C. Real, upright, same size D. Solid and liquid state D. Virtual, upright, diminished 17th NSO - SET B 4 20. Bulb 1 and bulb 2 are connected in series as shown 25. Some changes are classified as given below : in the given figure (i). S. Change Chemical Reversible What will happen to the brightness Bulb 1 Bulb 2 No. change change of these two bulbs when a third identical bulb is connected across I. Sliced apple turning   Figure (i) bulb 1 as shown in the given brown figure (ii)? II. Crystallisation of sugar  ü Bulb 1 Bulb 2 Bulb 1 Bulb 2 III. Cooking of vegetables  ü A. Brighter Brighter B. Brighter Dimmer IV. Photosynthesis ü  C. Dimmer Dimmer V. Developing photo-  ü D. Dimmer Brighter Figure (ii) graphic films 21. An old man moves along a semi-circular track of VI. Crumpling of paper  ü radius 40 m during morning walk. If he starts at Which of the above changes are incorrectly one end of the track and reaches the other end, the matched? distance covered and displacement of the man with A. I, II, III and VI B. I, III and V respect to the starting point are respectively _____ . A. 120 m, 40 m B. 126 m, 80 m C. II, IV and VI D. All are correct. C. 110 m, 60 m D. 50 m, 120 m 26. O b s e r v e t h e f o l l o w i n g e x p e r i m e n t a l s e t - u p 22. A sphere, a cube and a thin circular plate, all of carefully. same material and same mass, are initially heated to same high temperature. Then the ________ . A. Sphere will cool fastest and cube the slowest Air B. Plate will cool fastest and sphere the slowest Air Dry Layer of oil C. Cube will cool fastest and sphere the slowest air (prevents air D. Sphere will cool fastest and plate the slowest Rusty dissolving in iron the water) 23. Rohan blows air with a straw near the opening of nails another straw which has its other end in a soft drink bottle as shown in the given figure. The level of the Distilled Anhydrous Boiled distilled water calcium chloride water soft drink in the straw rises up as (drying agent) soon as air is blown over its open end. Which one of the following best What conclusion can you draw? explains the reason for rise in level A. Only air (dry) can cause rusting. of the drink? B. Air and water are needed for rusting. A. Blowing of air increases pressure over the open C. Only water (air free) can cause rusting. end of straw. D. Data is insufficient to conclude anything. B. Blowing of air decreases the pressure on the surface of soft drink in the bottle. 27. Yash wants to prepare lemonade for his mother. He C. Blowing of air decreases pressure over the open has no idea about the quantity of water, salt, sugar end of straw. D. Blowing of air increases the pressure on the surface and lemon to be added. Suddenly, he observes that of soft drink in the bottle. no more salt or sugar can be dissolved in the amount of water he has taken. 24. If the strength of the current flowing through a coil Which of the following statements is not correct? is increased, then which of the following statements A. The solution obtained is saturated solution. is true regarding it? B. Yash can solve his problem by using large quantity A. Strength of the magnetic field decreases. of water. B. Strength of the magnetic field increases. C. Amount of heat generated due to resistance C. By stirring well, more salt can be dissolved. decreases. D. Some more sugar can be dissolved in solution by D. Strength of the magnetic field remains constant. heating. 17th NSO - SET B 5 28. Study the given flowchart and select the appropriate Column-I Column-II option. a. Indigestion (i) Calamine solution Substances b. Bee sting (ii) Calcium carbonate c. Tooth decay (iii) Milk of magnesia d. Wasp sting (iv) Vinegar Edible Non-edible A. a-(iii), b-(iv), c-(ii), d-(i) B. a-(iii), b-(i), c-(ii), d-(iv) Soluble Insoluble Float Sink C. a-(i), b-(iii), c-(iv), d-(ii) D. a-(iv), b-(i), c-(iii), d-(ii) Solid Liquid S T U 32. The given diagram was drawn to show the sequence P of events associated with acid rain pollution but was Sour Sweet mistakenly left blank. Q R P Q S U A. Glucose Lemon juice Mustard oil Eraser B. Eraser Mustard oil Thermocol Honey balls C. Thermocol Lemon juice Mustard oil Glucose balls Complete the diagram with correct sequence of events D. Honey Glucose Eraser Thermocol from the following list. balls a. Sulphur dioxide rises into the atmosphere 29. In the given reaction : b. Acid rain falls (P) + CO2 (Q) + (R) c. Fish die in acidified lakes China rose Red litmus (Milky) d. Discarded car batteries leak acid indicator solution e. Fuel combustion in power stations Turns green No change in colour f. Ozone is produced in power stations P, Q and R are respectively g. Pollutant combines with water vapour A. CaCO3 Ca(OH)2 H2 O A. e, d, a, f, c B. e, a, g, b, c B. Ca(OH)2 CaCO3 H2O C. d, f, g, b, c D. c, g, f, e, b C. Mg(OH)2 H2O MgO 33. Siddhi put a balsam plant in a beaker of black ink D. Ca(OH)2 H2O CaCO3 as shown below. After 3 days, she cut open a section 30. Kritika set-up the experiment as shown in the diagram. of the stem of the plant and observed it. She took three identical containers with ice and left them at different places. Balsam plant Lamp Beaker Black ink solution Cold water Floor Set-up A Set-up B Set-up C Which one of the following diagrams would she After 10 minutes, she observed that lowest amount observe? of water was present in A. Set-up A B. Set-up B A. B. C. Set-up C D. All set-ups contain equal amount of water. 31. Match the problems given in Column-I with their C. D. remedies in Column-II and mark the correct option from the given codes. 17th NSO - SET B 6 34. The given graph shows the percentage of undigested 37. Which conditions would result in the highest rate of carbohydrates, proteins and fats through successive movement of oxygen from the alveolus into the blood parts of the human alimentary canal. capillaries? Concentration Concentration Rate of of oxygen in of oxygen blood flow the alveolus in blood in blood capillary capillary A. High Low Fast B. High Low Slow C. Low High Fast Why does the percentage of undigested carbohydrates D. Low High Slow remain constant in part X? A. All the starch has been digested and only other 38. Fish are adapted for swimming and their swimming carbohydrates remain. speed depends on several factors such as shape of B. Protease at part X prevents the salivary amylase the fins, body etc. Keeping this in mind, arrange from acting on starch. the following fish in order, starting from the fastest C. The acidic conditions of part X prevent salivary amylase from acting on starch. swimmer to the slowest. D. All the carbohydrates have been digested before reaching part X. 35. The rate of water uptake by a Hibiscus plant kept outdoors was recorded over a few days. The graph P Q R below shows the results obtained. A. P, Q, R B. P, R, Q Rate of water uptake C. Q, R, P D. Q, P, R 39. Garima carried out a fair test to find out the speed with which water passed through four different kinds of soil. She recorded her findings in the table below. Kind of soil P Q R S Midnight Noon Midnight Noon Midnight Noon Midnight Day 1 Day 2 Day 3 Time Time taken (seconds) 33 23 45 18 Which of the following does not explain why water In which type of soil would you find the mangrove uptake was higher at noon than midnight on all the trees growing in? three days? A. P B. Q A. Transpiration pull is stronger in high light C. R D S intensity. 40. The given Venn diagram B. The rate of transpiration increases with temperature. represents characteristics of P Q C. The occurrence of photosynthesis in the guard three gases P, Q and R. In X cells opens the stomata during the daytime. atmosphere, more than 3/4 D. Air is generally more humid in day time which Z Y increases the transpiration pull. part of air consists of R, R about 1/4 part consists of 36. Kanika noticed that her potted plant was not growing P and a very minor fraction healthily. She put three earthworms into the pot. After a is composed of Q and other few weeks, she noticed that her plants looked healthier. What could be the possible reason for this ? gases. A. The earthworms ate up the pests in the soil. Select the incorrect option regarding the characteristics B. The earthworms helped the plant to take in of X, Y and Z. water. A. X – Support life on earth C. The earthworms allowed the plant to make food B. Y – Inhibit combustion faster. C. Z – Form compounds that are components of acid D. The earthworms increased the air and nutrient rain content of the soil. D. None of these 17th NSO - SET B 7 41. Which of the following statements support(s) the fact for your reference. Select the number of errors in it, that the upper surface of a leaf is usually greener than including the given error. the lower surface? Cotton is a soft fibre that grows around the fruit (i) More chlorophyll is present on the upper surface of the cotton plant (cottonbolls). After maturing, to absorb more light. cottonbolls are burst open, the seeds are then separated (ii) There are more stomata present on the upper from the cotton fibres by shearing. This process was surface than the lower surface. earlier done by machines, nowadays done by hands. (iii) More sugar is formed on the lower surface. The raw cotton fibres are pulled apart and cleaned to (iv) The green leaves look greener under the hot remove all dust and impurities. This process is known Sun. as carding. The fibre is then cleaned, straightened A. (i) only B. (ii) and (iii) and made into soft, untwisted fabrics. This process C. (ii) and (iv) D. (iv) only of making fabrics is known as spinning. A yarn is made from two sets of fabrics arranged together. This 42. Read the following statements (i-iv) with blanks and is done by knitting. select the option that correctly fills the blanks in any A. 4 B. 8 two of the statements. C. 10 D. 5 (i) The process of unwinding the silk filaments 45. Match column I with column II and select the correct from the cocoon and combining them together option from the codes given below. is called ________. Column I Column II (ii) ________ is removal of fleece from animal. (Foods) (Major Nutrient (iii) ________ is the principle component of silk. present) (iv) ________ straightens the woollen fibre and also (a) Cheese, egg, milk 1. Iron removes residual dirt. A. (i) Reeling, (ii) Sorting (b) Yellow or orange 2. Vitamin D B. (ii) Scouring, (iv) Carding coloured fruits C. (iii) Fibroin, (iv) Carding or vegetables D. (i) Weaving, (iii) Fibroin (c) Guava, tomato, 3. Calcium citrus fruit 43. The oxygen cycle is a delicately balanced process. (d) Green leafy 4. Vitamin A Which of these, however, can upset this balance? vegetables A. Acid rain and ozone depletion 5. Vitamin C B. Deforestation and excessive burning of fuels 6. Proteins C. Excessive use of fertilizers and pesticides A. a-3; b-2, 5; c-5; d-1, 4 D. Overpopulation and forestation B. a-3, 6; b- 4; c-5; d-1, 2 44. The given passage is on the production of cotton C. a-3, 6; b-1, 2; c-4; d-5 fabric. It has some errors. One of which is highlighted D. a-4, 5; b-1; c-3, 6; d-2 ACHIEVERS SECTION Direction (Q. No. 46 and 47) : Refer to the given 47. Which of the following statements regarding this experimental set-up to answer the questions. set-up is not true? A. Any carbon dioxide found in flask 3 is produced by the insect. B. Only the solution in flask 4 should show a visible change. C. The insect will die after some time due to the lack of oxygen. 46. What is the purpose of flask 2? D. The purpose of flask 1 is to remove carbon dioxide A. To dry the air entering flask 3 for oxygen from the air. B. To test the air entering flask 3 for carbon 48. A painter leans his back against a painted wall while dioxide looking into a 1 m long mirror at the opposite end C. To test whether the gas produced by the insect of a rectangular room as shown in the given figure. contains carbon dioxide How much of the painted wall can he see through D. To remove carbon dioxide from the air entering the given mirror? flask 3 17th NSO - SET B 8 1 m long mirror (i) (ii) (iii) (iv) (v) (vi) A. 1m A. 2 4 3 4 1 3 B. 2m B. 4 2 1 3 4 1 Painter 12 m C. 6 m C. 1 3 2 4 1 3 D. 2 4 1 3 2 4 D. 12 m Painted wall 50. The diagram below shows two plants of the same 49. A science teacher has arranged the following sets species. Refer to the diagram to answer the following of test tubes. questions. 5 mL 10 mL Hydrochloric Orange acid + 10 mL juice Soap solution (1) (2) Few drops of 10 mL Nitric Lemon juice acid + 5 mL Window cleaner 10 mL Milk of magnesia (3) (4) (i) Which arrow indicates a process that would She asked the students to fill in the blanks by observing not lead to sexual reproduction ? the above experimental set-up carefully. (a) Turmeric solution turns red in test tubes (ii) Which arrow represents a type of pollination (i) and (ii) . that would result in greater adaptability of the (b) China rose indicator turns dark pink in test tubes particular species to potential environmental (iii) and (iv) . changes? (c) Phenolphthalein gives pink colour in test tubes A. (i)-Y, (ii)-Z B. (i)-Z, (ii)-X (v) and (vi) . C. (i)-Y, (ii)-X D. (i)-X, (ii)-Y SPACE FOR ROUGH WORK Class 7 18th Set 1 Year 2015 logical reasoning 1. Select a figure from the options which 7. Five friends Aman, Karan, Gaurav, Raman and Pawan does not satisfies the same condition are sitting around a circle facing the centre. Pawan is of placement of the dots as in second to the left of Raman, who is to the immediate Fig. (X). left of Gaurav. Karan is the neighbour of Gaurav. Then Fig. (X) who is sitting to the immediate right of Gaurav? A. Aman B. Pawan A. B. C. Raman D. Karan 8. Tarun faces towards North. Turning to his right, C. D. he walks 25 metres. He then turns to his left and walks 30 metres. Next, he moves 25 metres to his right. Finally, he turns to the right and moves 40 metres. In which 2. If in a certain code ‘VERBAL’ is written as ‘YHUEDO’, then how will ‘PERFECT’ be written in the same code direction is he now from his starting point? language? A. South-West B. South A. CTZXPUV B. RGTHGEV C. North-West D. South-East C. SHUIHFW D. SHTHGFW 9. Select a figure from the options, which when placed 3. Which of the following numbers will complete the in the blank space of Fig. (X) would complete the given number series? pattern. 7 , 3 , 8 , 6 , 10 , 9 , 13 , 12 , 17 , ? , 22 A. 13 B. 14 C. 15 D. 16 D D 4. The four different positions of a dice are given ? below. Fig. (X) 1 1 5 6 3 4 4 2 1 2 2 4 A. B. D Which number is on the face opposite to 1 ? A. 6 B. 2 D C. 3 D. 4 C. D. 5. Pointing to a photograph X said to his friend Y, “She is the only daughter of the father of my mother.” 10. The question consists of a set of three figures X, Y How X is related to the person in the photograph? and Z showing a sequence of folding of a piece of A. Sister B. Son paper. Fig. (Z) shows the manner in which the folded C. Nephew D. None of these paper has been cut. Select a figure from the options 6. Select a figure from the options which will continue which would most closely resemble the unfolded form the same series as established by the Problem of fig. (Z). Figures. Problem Figures ? X Y Z A. B. A. B. C. D. C. D. 2 | 18th NSO | Class-7 | Set-1 | Level 1 Science 11. A plane mirror is positioned C. Upside of the object will be down side of the at the corner of a road as image. X shown in the given figure. Which man/men can the  1  D. Right side of the object will be left side of the image. observer X see through the 2 mirror?  3 16. Read the given statements and mark the correct option. A. 2 only B. 1 only Statement 1 : One complete to and fro motion of a C. 1 and 2 only D. 2 and 3 only clock’s pendulum takes one second. Statement 2 : Anything that occurs or appears at regular 12. The given diagram shows an electrical appliance with intervals can help us to measure time. a metal box, indicated by the dotted line, connected to A. Both statement 1 and statement 2 are true a mains supply. Where should the fuse be placed? Switch P and statement 2 is the correct explanation of Live × Metal statement 1. box B. Both statement 1 and statement 2 are true but ×Q statement 2 is not the correct explanation of statement 1. R Neutral × C. Statement 1 is true but statement 2 is false. Earth × D. Statement 1 is false but statement 2 is true. S A. P B. Q 17. A magnet X is being moved Y C. R D. S slowly towards another magnet N Y which has attracted steel pins 13. Which of the following statements are true? as shown in the given figure. (i) High speed wind increases air pressure. The string of attracted pins S (ii) At night, the land cools faster than water which A. Remains stationary results in land breeze. B. Gets attracted to the left X (iii) At poles, the air is very cold and sinks close to C. Gets repelled to the right N S the surface creating high pressure area. (iv) Air exerts pressure sometimes only. D. Falls off from the magnet. A. (i) and (ii) B. (ii) and (iii) 18. The diagram shows a thin copper rod being heated evenly C. (iii) and (iv) D. (i), (ii) and (iii) along its length. Which of the following statements is 14. Three glasses containing water at the same temperature, true about the rod? are placed side by side touching each other as shown Copper rod in the given figure. Given 50°C 50°C 50°C that glass 1 contains 0.3 kg of water, glass 2 contains 0.5 kg of water and glass Heat 3 contains 0.1 kg of water. A. The bar expands and becomes lighter. Which of the following 1 2 3 B. The bar will become shorter in length. statements is true? C. The bar expands and its length increases. A. Heat flows from glass 1 to glass 2 and from D. The bar expands and becomes heavier. glass 2 to glass 3. B. Heat flows from glass 2 to glass 1 and from 19. An object O is placed in between two plane mirrors, glass 2 to glass 3. P and Q, as shown in the given figure. C. Heat flows from glass 1 to glass 2 and from P Q glass 3 to glass 2. D. Heat does not flow among these three glasses. R S O T U 15. Which of the following is correct for lateral inversion? A. Right side of the object will be right side of the Which is a possible image of the object? image. A. R B. S B. Left side of the object will be left side of the C. T D. U image. 18th NSO | Class-7 | Set-1 | Level 1 | 3 20. Reeta puts two different objects in each of the following 24. Which of the following changes does not require containers. heat? Container (i) : Copper coin and iron nail A. Wet clothes to dry clothes Container (ii) : Steel nail and aluminium earring B. Rolling out roti from a ball of dough C. Baking of a cake Container (iii) : Marble and gold coin D. Expansion of metal rim Container (iv) : Nickel coin and steel nail She can use a magnet to separate the objects in 25. Dilute hydrochloric acid containers __________ . is added to dilute sodium A. (i) and (ii) B. (i), (ii) and (iii) hydroxide as shown in Dilute C. (i), (ii) and (iv) D. (i), (ii), (iii) and (iv) the figure. hydrochloric Which of the following is acid 21. The given figures show incorrect about the mixing Dilute sodium the colour changes in test of these substances? hydroxide tubes I, II and III, when I. There is no change in the arrangement of atoms. China rose indicator is II. On mixing the substances, two new products will added to them. The be formed. respective solutions in III. The word equation for the reaction is I II III test tubes I, II and III (Magenta) (No colour (Green) Hydrochloric acid + Sodium hydroxide are change) Sodium chloride + Water A. Soda water, Nitric acid, Orange juice IV. The chemical reaction is called neutralisation and B. Vinegar, Lime water, Sugar solution it is endothermic. C. Sodium hydroxide, Lemon juice, Baking soda A. II and III B. III and IV D. Tamarind juice, Salt solution, Soap solution C. I and II D. I and IV 22. On the basis of physical and chemical changes, find 26. Match the column I with column II and select the the odd one out. correct option from the given codes. P. Oxidation of a slice of brinjal Column I Column II Q. Burning of magnesium ribbon P. Ascorbic acid (i) Organic matter R. Crystallisation of copper sulphate Q. Indigestion (ii) Calamine solution S. Corrosion of a metal R. Ammonium hydroxide (iii) Amla A. P B. Q S. Ant bite (iv) Milk of magnesia C. R D. S T. Basic nature of soil (v) Window cleaner 23. The given flowchart was prepared by Neelima for  P Q R S T sorting materials into different groups. She handed A. (iii) (iv) (v) (i) (ii) over the chart to her teacher with few blanks. Fill in B. (v) (ii) (iv) (iii) (i) the blanks from the given options. C. (ii) (iii) (v) (i) (iv) D. (iii) (iv) (v) (ii) (i) Metal ball, Pencil, Salt, Honey, Kerosene oil, Butter 27. A mixture contains three different substances P, Q and R. The properties of these substances are listed in the Edible Non-edible given table. Substances Properties Soluble in Insoluble in Floats on Sinks in water water water water P, Q and R All of same size R U P Heavy, insoluble in water Solid Liquid Solid Liquid Q Light, insoluble in water P Q S T R Powder, soluble in water A. P-Butter, Q-Honey, R-Salt, S-Metal ball, Which of the following sequence of methods will be T-Kerosene oil, U-Pencil suitable for separating each of the components from B. P-Salt, Q-Honey, R-Butter, S-Pencil, the mixture? T-Kerosene oil, U-Metal ball A. Filtration followed by evaporation C. P-Salt, Q-Butter, R-Honey, S-Metal ball, B. Churning followed by magnetic separation T-Pencil, U-Kerosene oil C. Sedimentation-decantation and filtration followed D. P-Pencil, Q-Honey, R-Butter, S-Salt, by evaporation T-Kerosene oil, U-Pencil D. Evaporation followed by winnowing 4 | 18th NSO | Class-7 | Set-1 | Level 1 28. Observe the given diagram X 32. Read the given paragraph. carefully. W is a form of malnutrition in which nutrients are Y + Water Z over supplied relative to amounts required for normal (Base) Open gas jar growth, development and metabolism. It leads to X . X, Y and Z are respectively Dazzling Deficiency is another form of malnutrition. Deficiency of A. Ca, CaO, Ca(OH)2  white light nutrients like protein leads to Y whereas deficiency B. Mg, MgO, Mg(OH)2 of proteins and calories leads to Z . C. Na, Na2O, NaOH White solid (Y) Identify W, X, Y and Z and select the option that correctly D. C, CO2 , H2CO3 fills the blanks in above paragraph. W X Y Z 29. Refer to the given A. Overnutrition Obesity Kwashiorkor Marasmus diagram of stomach of B. Undernutrition Scurvy Marasmus Kwashiorkor ruminant mammal with C. Overnutrition Blood pressure Anaemia Rickets its parts labelled as P, D. Undernutrition Obesity Marasmus Goitre Q, R and S and select the correct option. 33. Match the items given in column I with the items in A. The parts labelled P, Q, R and S are called reticulum, columns II and III and select the correct option. rumen, abomasum and omasum, respectively. Column I Column II Column III B. The part labelled Q is true stomach. P. Polar bear a. Desert 1. Well-padded C. Food is completely digested in chambers wide feet P and R. Q. Monkey b. Polar 2. Flat and broad D. Digestion of cellulose takes place in P, S and R. region paws R. Camel c. Tropical 3. Feet with sticky 30. Three tubes A, B and C, as shown in the figure, were forests pads left in sunlight for one hour. Each tube was provided S. Penguin 4. Thin and long with a bicarbonate indicator which is used to indicate tail the presence of carbon dioxide in aqueous solutions. T. Red-eyed 5. Streamlined The indicator was red at the start of experiment. frog body and webbed feet P Q R S T Water + Water + A. b, 3 c, 4 a, 4 c, 5 a, 2 Water Bicarbonate indicator Bicarbonate indicator Water plant B. b, 2 c, 4 a, 1 b, 5 c, 3 + Bicarbonate C. b, 1 a, 4 c, 2 a, 5 c, 5 Water indicator Snail plant Snail D. b, 2 a, 4 a, 3 b, 5 a, 5 Tube A Tube B Tube C 34. Which of the following food items are sources of Which of the following changes in the colour of indicator sucrose, starch and cellulose respectively? will be observed in the experiment? A. Meat, fruits and potatoes B. Spinach, corn and meat A. Bicarbonate indicator will stay red in all the three C. Table sugar, rice and grass tubes. D. Fruits, eggs and wheat B. Colour of bicarbonate indicator in test tube C will change to yellow. 35. Various technical terms related R M S L U N G C. Colour of bicarbonate indicator in test tube A will to respiratory system of I G I L L N T change to purple. different organisms are hidden B A O I D O R C R M Y M S A D. Colour of bicarbonate indicator will change to in the given word grid. A H A A N T C purple in test tube B. Which of the following is G P T B Z R H not present in the given word E A A T S I E 31. Sheep are the major source of wool. During the P I R A C L A grid? production of wool from a sheep, it passes through (i) The air tubes of insects. several steps, such as scouring (P), drying (Q), dyeing (ii) Skeletal structure which protects the lungs. (R), spinning (S), shearing (T) and carding (U). (iii) The opening through which humans inhale air. Which of the following options shows the correct (iv) Small opening on the sides of the body of an insect. sequence of these steps? (v) A flap like structure which covers the glottis at the A. T → P → Q → U → R → S time of swallowing in humans. B. P → T → Q → R → U → S (vi) Respiratory organ of fish. C. U → P → R → Q → T → S A. (i) and (ii) only B. (ii), (v) and (vi) only D. R → P → Q → T → S → U C. (iii) and (iv) only D. (iv) and (v) only 18th NSO | Class-7 | Set-1 | Level 1 | 5 36. The diagrammatic representation shows the pulmonary 39. The given table shows the characteristics of four and systemic circulations. Identify the parts labelled different seeds or fruits P, Q, R and S. as a, b, c, and d and select the correct option. Seed/Fruit Size Weight Other characteristics Deoxygenated Oxygenated blood Lungs blood P Small Light It has hooks. Heart a Q Small Light It has wings. c RA LA R Big Heavy It has fleshy and sweet RV LV pulp. b d S Big Heavy It is buoyant with a Body fibrous husk. Deoxygenated Oxygenated blood blood By which method P, Q, R and S get most likely A. a- Pulmonary artery, b- Pulmonary vein, dispersed? c- Aorta, d- Vein P Q R S B. a- Pulmonary vein, b- Vein, A. By wind By animals By water By animals c- Pulmonary artery, d- Aorta B. By animals By animals By explosion By water C. a- Pulmonary vein, b- Aorta, C. By animals By wind By animals By water c- Vein, d- Pulmonary artery D. By explosion By water By animals By wind D. a- Aorta, b- Vein, c- Pulmonary vein, d- Pulmonary artery 40. Read the given statements and select the correct option. 37. Priya conducted an experiment as shown here. Statement 1 : The level of groundwater below the surface of the earth at a given place is known as the water table. Statement 2 : Extensive use of groundwater in cities A B C for domestic and industrial purposes is resulting in lowering of water table. 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 Select the correct statement regarding this. not the correct explanation of statement 1. A. Lime water in test tube B does not turn milky C. Statement 1 is true but statement 2 is false. because potassium hydroxide solution absorbs the D. Both statements 1 and 2 are false. CO2 from incoming air. B. Lime water in test tube C turns milky as germinating 41. Study the given concept map and identify X, Y and Z. seeds release CO2 which enters test tube C. Plant C. Lime water in test tube B turns milky because germinating seeds release CO2 into it. Propagates Propagates Propagates vegetatively vegetatively vegetatively D. Both A and B by roots by leaves by stem 38. The given picture shows a camel with its different X Y Z parts labelled as P, Q, R, S, T and U. P X Y Z T Q A. Bryophyllum Bougainvillea Carrot R B. Dahlia Bigonia Potato C. Bigonia Ginger Asparagus D. Bryophyllum Strawberry Dahlia U 42. Refer to the given diagram of P S human skeletal system with various joints labelled as P, Q, Q Which of the following statements is incorrect regarding R, S, T and U. Select the correct its adaptations? option regarding this. R (i) Q is slit-like and has flap to prevent the entry of A. Joints R, T and U move in sand. one plane only. U S (ii) R is leathery for chewing thorny plants. B. Joints P, R and T move in (iii) T is used for storing water. more than one plane. (iv) S is sticky and webbed to prevent it from sinking C. Joint P is an immovable T into sand. joint. A. (i) and (iii) only B. (ii) and (iv) only D. Joints R, S and T move in C. (iii) and (iv) only D. (ii) and (iii) only more than one plane. 6 | 18th NSO | Class-7 | Set-1 | Level 1 43. Refer to the given food web. C. R is saturated with moisture and represents water Q W table. P V D. S is a porous layer and consists of rock pieces with diameter less than 2 mm. R U S T 45. Match column I with column II and select the correct Which of the following statements is incorrect regarding option from the given codes. it? Column I Column II A. In the given food web, P and W are producers. P. Weaving a. Process of making yarn from B. The food web consists of more than five food fibres chains. Q. Knitting b. Spun from fibres and then used C. In the given food web, R behaves both as primary to make fabric consumer as well as secondary consumer. R. Ginning c. A single yarn is used to make D. In the given food web, T could be a deer or fabric rabbit. S. Spinning d. Process of arranging two sets of yarns together to make a fabric 44. The given diagram shows soil T. Yarn e. C ombing of cotton fibres to profile where different soil P remove seeds layers are labelled as P, Q, R Q P Q R S T and S. Select the incorrect option R A. c d e a b regarding this. B. d c a e b S C. d c e a b A. P is rich in humus. B. Few plant roots can reach Q. D. c d e b a Achievers Section 46. In a 100 m race, Gaurav and Sachin reached the finishing Fill in the blanks with an appropriate option. line at the same time. Which of the following are Both (i) and (ii) are essential for rusting. In test possible graphs to show that both competitors reached tube (iii) , the iron nail will rust faster. The process the finishing line at time t? of depositing a layer of a metal like chromium or zinc Speed (m s–1) Distance(m) Speed(m s–1) on iron to prevent rusting is called (iv) . av v ur av (i) (ii) (iii) (iv) ur ra Ga Ga u A. carbon dioxide moist air 2 oxidation Ga Sa ch Sachin in in B. oxygen water 1 galvanisation ch Time(s) Sa Time(s) Time(s) t t t C. water oxygen 3 galvanisation (i) (ii) (iii) D. water nitrogen 4 corrosion A. (i) and (ii) only B. (i) and (iii) only 48. Raj is fond of gardening. He planted two different C. (ii) and (iii) only D. (i), (ii) and (iii) types of flowering plants, pea and papaya in his garden. Both the plants grew healthily in the garden and then 47. Anamika has arranged the following experimental flowered after sometime. set-up to study the conditions necessary for rusting To check the fruit setting of these plants Raj covered the to take place. flowers of both plants using a polythene bag. After some days, he removed the polythene bags and found small pea fruits, but no fruits in papaya. What could possibly be the reason for this? A. Papaya plant did not get essential nutrients for setting fruits and seeds. Iron Iron Oil B. Papaya plant has unisexual flowers and female nail nail Water Water flowers can produce fruits in presence of pollinators Damp only. (slightly Chemical wet) to remove Painted Iron C. The flower of pea plant gets converted to fruit nail nail cotton moisture without pollination and fertilisation. wool in air D. Papaya plant is pollinated by insects whereas pea 1 2 3 4 plant is pollinated by the agency of water. 18th NSO | Class-7 | Set-1 | Level 1 | 7 49. Radha bought three different types of soil samples, P, Which soil sample can she use for making statue? Q and R from the market and then set-up an experiment A. P B. Q as shown to test the suitability of these soils for making C. Both P and Q D. Both Q and R statue. She put 50 gms of dry 50. The given graph shows changes in the pressure in lungs powdered soil of each sample during breathing. separately in three different 762 Atmospheric pressure funnels placed over three = 760 mm Hg different beakers and then Air pressure in the lungs 760 Time slowly poured water on the (mm Hg) P Q R S T soil samples till the water just started dripping from the funnel. She then weighed the 758 three soil samples separately. The results are shown in the given table. Which of the following is incorrect regarding this? (i) Region R to T represents inhalation. Type Original Weight of soil (ii) Region P to R represents inhalation. of soil weight of soil sample after (iii) Region P to R represents exhalation. pouring water (iv) Ribcage will move upward and diaphragm will get flattened at point S. P 50 gm 60 gm (v) Ribcage will move downward and diaphragm will Q 50 gm 100 gm become dome shaped at point S. A. (ii), (iii) and (v) B. (i), (iii) and (iv) R 50 gm 70 gm C. (ii) and (v) only D. (i) and (iii) only SPACE FOR ROUGH WORK 8 | 18th NSO | Class-7 | Set-1 | Level 1 Class 7 18th Set 2 Year 2015 logical reasoning 1. Three of the following four options are alike in a 6. Anu remembers that her friend had visited her after certain way based on their positions in the given 13th but before 18th of the month, while Anu's sister arrangement and so form a group. Find the one that remembers that Anu's friend had visited after 16th does not belong to that group. but before 20th. If it was Friday on 1st of the month, B 4 @ D A © 7 9 F % 2 R 5 H 6 E * N $ 1 U then on which day of the week, Anu's friend visit to her? W3 PT8 dV#YI A. 5 6 2 B. WPU A. Saturday C. © 9 D D. d#T B. Monday C. Sunday 2. There is a certain relationship on the either side D. Friday of ::. Identify the relationship and find the missing term. 7. Find the missing number, if a certain rule is followed REASON : SFBTPO :: MAGNET : ? in all the three figures. A. NBHMFU B. NBIPFS 1 3 1 C. NBHOFU D. OCIPGU 3 30 5 2 72 4 5 ? 2 4 6 8 3. Which of the following figures do not satisfies the A. 66 B. 40 same condition of placement of dots as in Fig. (X)? C. 61 D. 90 8. Two positions of a dice are shown below. A. B. When six is at the bottom, which number will be C. D. at the top? A. 1 B. 2 4. Some boys are sitting in three rows all facing North C. 4 D. 5 such that S is in the middle row. P is just to the 9. Select the term from the options which will continue right of S. Q is just behind of P while R is in the the given series. North of S. In which direction of R is Q? 2B11, 4E13, 8H15, ? A. South B. South-West A. 15K17 C. North-East D. South-East B. 16K19 5. Which of the following options will complete the C. 16J17 pattern in Fig. (X)? D. 16K17 10. Select the correct mirror image of the Fig. (X), if the mirror is placed vertically to the right. ? 9 Fig. (X) Fig. (X) A. B. A. B. 9 9 9 C. D. C. D. 9 2 | 18th NSO | Class-7 | Set-2 | Level 1 SCIENCE 11. Which of the following statements is/are true regarding 16. Which of the following statements about cyclone the effects of using a thin converging lens instead of is/are incorrect? a thick converging lens? (i) Cyclones are accompanied by very strong winds. (i) The image formed will be brighter. (ii) The centre of cyclone is a high pressure area. (ii) The focal length will be longer. (iii) Cyclones are known as typhoons in American (iii) The image formed will always be virtual. continent. A. (ii) only B. (i) and (ii) only (iv) There is heavy rain fall in the centre of cyclone. C. (ii) and (iii) only D. (i) and (iii) only A. (i) only B. (ii) only C. (i), (ii) and (iii) only D. (ii), (iii) and (iv) only 12. A solid substance is placed in a boiling tube and heated Temperature 17. Which car, moving from rest, has an average acceleration 4 steadily. The temperature- 3 of 2.0 m s–2? 2 time graph of the substance 1 A. A car reaching a speed of 10 m s–1 in 2 s. is shown in figure. At which labelled point would the B. A car reaching a speed of 20 m s–1 in 5 s. Time C. A car reaching a speed of 30 m s–1 in 10 s. substance be a mixture of liquid and gas? D. A car reaching a speed of 40 m s–1 in 20 s. A. 1 B. 2 18. Read the given statements and mark the correct option. C. 3 D. 4 Statement 1 : Convex lens can form real and inverted 13. The distance-time graph of motion of a cycle is shown images. here. What is the average speed of cycle over a time Statement 2 : Convex lens is used as magnifying glass. period of 12 s? Distance (m) A. Both statement 1 and statement 2 are true A. 0.48 m s–1 9 and statement 2 is the correct explanation of statement 1. B. 0.58 m s–1 B. Both statement 1 and statement 2 are true but C. 2.17 m s–1 3 statement 2 is not the correct explanation of 2 D. 3.17 m s–1 0 9 Time (s) statement 1. 5 12 C. Statement 1 is true but statement 2 is false. 14. Two plane mirrors are placed at 90° to each other. A D. Statement 1 is false but statement 2 is true. ray of light strikes one mirror and follows the path as shown in the figure. 19. Which coil will make the strongest electromagnet for Mirror a given flow of current? Light ray A. A 10 cm coil with 100 turns. 40° B. A 5 cm coil with 200 turns. C. A 10 cm coil with 200 turns. D. A 20 cm coil with 200 turns. X Mirror 20. Match the column I with column II and select the What is the value of angle X? correct option from the given codes. A. 20° B. 30° Column I Column II C. 40° D. 50° (a) Bulb (i) 15. A piece of ice is being heated till it turns to water and then to steam. Which of the following statements is true? (b) Cell (ii) A. The molecules expand as ice changes to steam. (c) Battery (iii) B. The molecules move faster as ice changes to (d) Open switch (iv) steam. A. (a)-(i), (b)-(ii), (c)-(iv), (d)-(iii) C. The molecules move closer to each other as ice changes to steam. B. (a)-(i), (b)-(iv), (c)-(ii), (d)-(iii) D. The intermolecular force of attraction increases as C. (a)-(ii), (b)-(iv), (c)-(i), (d)-(iii) ice changes to steam. D. (a)-(ii), (b)-(i), (c)-(iii), (d)-(iv) 18th NSO | Class-7 | Set-2 | Level 1 | 3 21. Kanika identified the nature of few substances with the 23. Four different substances are categorised based on help of three different indicators. She listed down her their properties in the given flowchart. observations in the given table with some blanks. Substances S. Substance Red Turmeric China No. litmus solution rose paper indicator Edible Non-edible 1. Lime water blue p green Transparent Opaque Lustrous Non-lustrous 2. Curd no change no change q Miscible Soluble Sinks Floats 3. Table salt no change no change no change with water in water 4. Toothpaste r red s P Q R S 5. Lemon juice no change no change magenta Identify the substances. Identify p, q, r and s. A. P-Oil, Q-Common salt, R-Matchstick, S-Coin p q r s B. P-Common salt, Q-Glycerine, R-Coin, S-Matchstick A. Magenta Green Blue Magenta C. P-Glycerine, Q-Common salt, R-Coin, S-Matchstick B. Red Magenta Blue Green D. P-Glycerine, Q-Sand, R-Coin, S-Matchstick C. Blue Magenta Red Green D. Green Red Magenta Blue 24. Sahil took some iron filings and mixed them well with sulphur powder. He could separate the iron filings with 22. Mrs. Rama, a science teacher has arranged the following the help of a magnet. Then, he heated the mixture for set-ups to demonstrate different types of changes. some time and tried to separate the iron filings with the magnet but he could not because Fumes of caramel and water vapours A. On heating, a chemical change takes place and a Test tube holder new compound is formed Water droplets B. On heating, a physical change takes place hence, Test tube iron and sulphur get mixed up Molten sugar turns into C. On heating, iron evaporates and only sulphur is brown caramel and then to left behind Burner black charcoal. D. None of these. Set-up 1 25. Match the column I with column II and select the correct option from the given codes. Ice on watch glass Ice Column I Column II Crushed (i) Fast change (p) Occurrence of day and naphthalene night balls and (ii) Periodic change (q) Spoiling of food Spirit sand Naphthalene (iii) Reversible change (r) Blowing of a balloon lamp crystals (iv) Undesirable change (s) Dropping an object Set-up 2 (i) (ii) (iii) (iv) A. p s q r Identify the types of changes taking place in these B. r q p s set-ups. C. s p r q A. In set-up 1, chemical-reversible change is taking D. q r s p place while in set-up 2, physical-irreversible change is taking place. 26. Which of the following methods can be used to B. In set-up 1, chemical-irreversible change is taking separate each component of the mixture containing place while in set-up 2, physical-reversible change iron filings, chalk powder and sugar? is taking place. A. Evaporation, use of a magnet and separating C. In both set-ups, physical-reversible changes are funnel taking place. B. Use of a magnet, filtration, followed by evaporation D. In both set-ups, chemical-irreversible changes are C. Winnowing, filtration, followed by condensation taking place. D. Handpicking, threshing, followed by evaporation 4 | 18th NSO | Class-7 | Set-2 | Level 1 27. Read the given statements and select the correct 31. Study the given experimental set-up, in which a option. burning candle has been placed in a beaker filled with Statement 1 : Calamine solution is applied on the water. The candle has been covered by an inverted skin when an ant bites. glass jar. Statement 2 : Ant injects ammonia into the skin Glass jar which can be neutralised by rubbing with calamine solution. Candle Water Beaker A. Both statements 1 and 2 are true and statement 2 Which of the following options correctly depicts the is the correct explanation of statement 1. results of the experiment after few minutes ? B. Both statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1. A. B. C. Statement 1 is true and statement 2 is false. D. Both statements 1 and 2 are false. 28. Observe the given flowchart carefully and mark the C. D. option which best represents I, II, III and IV. Compounds 32. Refer to the given diagram which shows various parts of human digestive system labelled as I, II, III, IV and V. I Base II I e.g., HNO3, HCl e.g., Ca(OH)2 e.g., NaCl, IV V II IV Inorganic Organic III e.g., H2SO4 e.g., III I II III IV Identify the organs and select the incorrect statement A. Salt Acid Acetic acid Limestone regarding them. B. Alkali Soda ash Iron sulphate Iron oxide A. Organ V is involved in storage of bile not its C. Acidic Salt Hydrochloric Copper production. Salt acid sulphate B. Organ II secretes digestive juice which contains D. Acid Salt Formic acid Baking soda mucus, hydrochloric acid and digestive enzymes. C. Organ IV is the largest gland of the body. 29. Refer to the given table showing the characteristics D. Organ I is involved in the absorption of water of three types of fabrics (I, II and III). from food. Fabrics Source of Air spaces Absorption 33. W h i c h o f t h e f o l l o w i n g Lungs individual between fibres of water statements is correct regarding fibres the given schematic of blood P Q I Plant Less Medium circulation in human body? Heart R II Animal More High A. Structures P and S have S III Chemical Minimum Minimum thick, elastic walls to allow stretching. Which of the following statements is incorrect Capillaries regarding this? B. P and R carry oxygenated blood. A. Fabric I is more suitable for summer clothing. C. Q carries deoxygenated blood at high pressure B. Fabric II will allow more body heat to escape than whereas S carries oxygenated blood at low pressure. fabric I. D. R and S have a series of valves and are superficially C. Fabric III can neither absorb body sweat nor can placed. keep the body cool. D. Fabric II is more suitable for winter clothing. 34. Read the given statements and select the correct option. Statement 1 : Chemical digestion of food involves 30. If the percolation rate of water through a soil sample breaking down of food by chewing and churning. is 50 mL/min, then how much time will 500 mL of Statement 2 : Mechanical digestion of food involves water take to percolate completely into the soil ? conversion of complex substances such as carbohydrates A. 5 minutes B. 10 minutes into their simpler forms such as glucose by enzymatic C. 15 minutes D. 20 minutes action. 18th NSO | Class-7 | Set-2 | Level 1 | 5 A. Both statements 1 and 2 are true and statement 2 38. Refer to the given table. is the correct explanation of statement 1. Name of the Presence/Absence Mode of B. Both statements 1 and 2 are true but statement 2 plant of leaves nutrition is not the correct explanation of statement 1. Mistletoe L Partially C. Statement 1 is true but statement 2 is false. parasitic D. Both statements 1 and 2 are false. Nepenthes Present M 35. While using iodine in the laboratory, some drops of Cuscuta N Completely iodine fell on Rashmi’s socks and some fell on her parasitic teacher’s saree. The drops of iodine on the saree Select the correct option for L, M and N. turned blue-black while the colour of iodine drop did L M N not change on the socks. What can be the possible reason? A. Present Partially heterotrophic Absent B. Absent Partially heterotrophic Absent A. The socks were made of nylon while saree was C. Present Autotrophic Present made of silk. D. Present Partially parasitic Absent B. The saree had been washed in starch solution to make it stiff. 39. Read the given paragraph. C. The socks were black in colour while the saree Joints are of different types based on the degree of was white in colour. freedom of movement. The joints found between the D. After washing, socks had been dipped in iodine skull bones are P joints. Joint Q is found between solution before drying. the skull and lower jaw. The joint between skull and first vertebra of backbone is R joint. 36. Which of the following statements is incorrect for the given food web? Select the correct option regarding these joints P, Q and R. Frog Snake A. Joint P shows 180° of movement in two planes. Insect Eagle B. Joint Q shows 180° of movement in one plane. Plant Sparrow C. Joint R shows 360° of movement in two planes. D. Joint P shows 360° of movement in one plane. A. The snake is both a predator and a prey. B. There is one producer and one omnivorous 40. Anushka bagged four different kinds of flowers organism in this food web. on the potted plants as shown below and left them C. A decrease in population of frog will cause an undisturbed. Which of these four flowers is the most increase in insect population. likely to produce fruits and seeds? D. There are three food chains in this food web. 37. Refer to the given key. A. B. I. (a) Fibres obtained from natural resources - Go to II (a) (b) Fibres obtained from chemicals - Go to IV (b) II. (a) Cellulose is the structural material - Go to III (b) Fibres made up of complex proteins - Go to C. D. IV (a) III. (a) Fibre obtained from seeds - P (b) Fibre obtained from stems - Q 41. Match column I with column II and select the correct IV. (a) Poor conductor of heat and gives smell of option from given codes. burning hair when burnt - R Column I Column II (b) Melts on burning - S P. Anther (i) Usually brightly coloured Identify P, Q, R and S and select the correct option Q. Pedicel (ii) Contains pollen grains regarding them. R. Stigma (iii) Stalk of the flower A. P is the strongest natural fibre available. S. Petals (iv) Receives pollen grains B. Q is one of the cheapest fibre and is also known as golden fibre. A. P – (iv), Q – (iii), R – (ii), S – (i) C. R can be obtained only by killing of source organism. B. P – (ii), Q – (iii), R – (iv), S – (i) D. S provides the best clothing material for winter C. P – (ii), Q – (i), R – (iii), S – (iv) clothing. D. P – (iii), Q – (iv), R – (i), S – (ii) 6 | 18th NSO | Class-7 | Set-2 | Level 1 42. Refer to the given flow chart. (iv) The material used to make the shaped-pieces. Protective No Help to build and Yes (v) The strength with which she pulled each shaped- food repair tissues P piece through the water. Yes A. (i), (ii) and (iii) B. (i), (iii) and (iv) Inorganic salts C. (i), (iii), (iv) and (v) essential for chemical No Q reactions in cells D. (i), (ii), (iii), (iv) and (v) Yes 44. Study the following features : R • Flowers are small and dull. Identify P, Q and R and select the correct option • Pollen grains are light weight. regarding it. • Stamens and stigmas are exposed. • Flowers are colourless and odourless. A. Deficiency of P can lead to diseases like • Pollen grains are produced in large numbers. kwashiorkor and marasmus. Above cited features are the characteristics of flowers B. If Q is water soluble then it is not stored in body in which pollination is brought about by the agency of but if it is fat soluble, it can be stored in body for future use. A. Wind B. Birds C. Deficiency of R can lead to diseases like anaemia, C. Insects D. Explosion. goitre, rickets, etc. 45. Which of the following D. All of these. best describes what Y 43. Chitra wanted to see what body shape would enable happens to the parts X and an animal to travel most easily through the water. Y during inhalation and She cut out shapes using pieces of styrofoam and tied exhalation ? X a piece of string to each of them. Then she pulled Inhalation Exhalation them through the fish pond in school. What factors X Y X Y should she keep the same so that the experiment is a fair one? A. Contracts Moves down Relaxes Moves up B. Relaxes Moves down Contracts Moves up (i) The length of the string. (ii) The size of the shaped-pieces. C. Contracts Moves up Relaxes Moves down (iii) The material used to make the string. D. Relaxes Moves up Contracts Moves down Achievers Section 46. The diagram shows an electric bell. Which materials 47. Observe the given figure carefully and fill in the would be suitable for the parts labelled X, Y blanks by choosing an appropriate option. and Z? X X Z (turns lime Y water milky) Z Y 1 2 3 X Y Z A. Sugar Nitric acid Nitrogen X Y Z B. Salt Ammonium Ammonia A. Soft iron Brass Soft iron hydroxide B. Soft iron Soft iron Steel spring C. Baking soda Acetic acid Carbon dioxide C. Soft iron Brass Brass D. Copper Hydrochloric Hydrogen D. Steel spring Soft iron Steel spring acid 18th NSO | Class-7 | Set-2 | Level 1 | 7 48. Read the given passage. Select the correct statement regarding this. Sometimes during heavy physical exercise, your A. For first three hours, the plant was kept in a dark body cannot get enough P to produce the room. required energy. To get the additional energy, B. At 3rd hour, the plant was moved to a sunny place. Q respiration occurs in your R , during which C. For first 3 hours, the plant was photosynthesising partial breakdown of glucose occurs and S is but was not respiring. produced. D. Both A and B Which of the following statements is incorrect regarding P, Q, R and S? 50. Read the given passage. A. P represents oxygen. The land near the equator is colder than the land away B. Q is the type of respiration that occurs in the from it. Near the equator, Sun's rays fall vertically. As presence of oxygen. the latitude increases, the rays become more and more C. R represents muscle cells of our body. slanting. Vertical rays spread over a larger land area D. Accumulation of S in muscles causes muscular than slanting rays. Also, they pass through a thicker cramps. layer of the atmosphere which absorbs a large part of their heat. Hence, the land near the equator gets 49. The given graph shows the variations in oxygen heated up lesser by the sun than the land away from release and uptake by a plant over a period of 10 hours. it, in a given time. Increasing Some of the words have been italicised in the given oxygen passage. Select the incorrect statement regarding these. release A. The words colder and lesser need not to be replaced 0 1 2 3 4 5 6 7 8 9 10 as they are correctly mentioned. Increasing oxygen Time / hour B. Larger should be replaced by smaller. uptake C. Thicker should be replaced by thinner. D. None of these SPACE FOR ROUGH WORK 8 | 18th NSO | Class-7 | Set-2 | Level 1 Class 7 19th Set A Year 2016 logical reasoning 1. Which of the following figures do not satisfy the same 6. There is a certain relationship between figures (1) and condition of placement of dots as in Fig. (X)? (2). Establish the same relationship between figures (3) and (4) by selecting a suitable figure from the options that would replace the (?) in Fig. (4). A. B. A. B. C. D. C. D. 2. Which of the following is the net of the given Fig. (X)? 7. If the first and the second digits of each of the following numbers are interchanged, then which number will Fig. (X) be the smallest? 358 426 853 674 592 A. 358 B. 426 A. B. C. 853 D. 674 8. Two positions of a dice are shown below. If the face with 1 dot is at the bottom, then the number of dots C. D. on the top face is A. 2 3. Find the missing number, if same rule is followed in B. 3 all the three figures. C. 4 A. 16 D. 5 B. 18 9. In a certain code language, the word FIENDISH is C. 10 written as DFHNSEII. How will the word HESITATE D. 14 be written in that language? 4. Read the following information carefully. A. HSTTEEAI B. HTTSAEEI 'A@B' means 'A is added to B'. C. HSTTAEEI D. HSTTIEEA 'A * B' means 'A is multiplied by B'. 10. Select a figure from the options, which when placed 'A#B' means 'A is divided by B'. in the blank space of Fig. (X) would complete the 'A$B' means 'B is subtracted from A'. pattern. Total age of 12 boys is 'X' and the total age of 13 girls is 'Y'. What is the average age (A) of all the A.  boys and girls together ? A. A = (X@Y) # 25 B. A = (X$Y) # 25 C. A = (X@Y) * 25 D. None of these B. 5. There are 8 friends A, B, C, D, E, F, G and H seated in a circle facing the centre. AC, DG, HE and FB are seated adjacent to each other. A is also seated adjacent C. to H. B is second to the right of H. E is third to the right of C. What is C's position with reference to F? A. 5th to the right B. 4th to the left D. th C. 4 to the right D. 3rd to the right 2 | 19th NSO | Class-7 | Set-A | Level 1 Science 11. Sagar wants to magnetise Column-I Column-II an iron bar EF by the P (a) Railway engine (i) Quintal stroking method. The given (b) Packet of chilli powder (ii) kg Magnet (c) Sack of wheat (iii) mg figure shows the direction of stroke. (d) Huge bag of sand (iv) g Q Which of the following is a Direction of stroke (e) Aspirin tablet (v) Metric ton possible set of polarities for E F A. (a) - (v), (b) - (iv), (c) - (i), (d) - (ii), (e) - (iii) the given arrangement? Iron bar B. (a) - (i), (b) - (ii), (c) - (iii), (d) - (iv), (e) - (v) P Q E F C. (a) - (ii), (b) - (iv), (c) - (v), (d) - (iii), (e) - (i) A. North South South South D. (a) - (iii), (b) - (ii), (c) - (iv), (d) - (v), (e) - (i) B. North South North North 16. Two parallel rays of light strike a concave lens. Which C. South North South North of the following correctly shows the passage of the rays D. South North North South after passing through the lens? 12. A photographer wishes to take pictures without being noticed. He sets up two plane mirrors together with A. B. his camera. Which arrangement of mirrors will allow the photographer to take pictures of someone behind the camera? C. D. A. B. 17. Misha, a class VII Live wire Switch student suggests the given circuit setup. Supply Bulb Her teacher said that C. D. this circuit is unsafe Neutral wire Fuse because A. The switch is wrongly connected B. The fuse is wrongly connected 13. The diagram shows a man C. The bulb is fused Sun standing under a shelter on D. Live wire and neutral wire have been interchanged. a sunny day. Given that the Thick plastic man feels hot, which of the roof 18. Three liquids with their respective boiling and freezing following shows the processes points are shown in the given table. of how thermal energy from Liquids Freezing point Boiling point the Sun reaches the man? Mercury –39°C 357°C A. Radiation → Conduction → Radiation Alcohol –112°C 78°C B. Radiation → Conduction → Convection Pentane –180°C 36°C C. Radiation → Convection → Radiation A thermometer that can measure both –50°C and 38°C D. Radiation → Convection → Convection should be filled with __________. 14. Read the given statements and select the correct A. Mercury only B. Alcohol only option. C. Pentane only Statement 1 : It is difficult to ride a bicycle against the D. Either alcohol or pentane direction of wind. 19. Solve the following riddle by identifying X, Y, Z. Statement 2 : High speed winds are accompanied by X : I am present in a closed circuit only. increased air pressure. Y : I am a source of energy available in different shapes A. Both statements 1 and 2 are true and statement 2 and sizes. is the correct explanation of statement 1. Z : I am a device used for making and breaking the B. Both statements 1 and 2 are true but statement 2 is electric circuit. not the correct explanation of statement 1.    X    Y    Z C. Statement 1 is true but statement 2 is false. A. Electric current Electric switch Electric cell D. Both statements 1 and 2 are false. B. Electric switch Electric cell Electric current 15. Match Column-I with Column-II and select the C. Electric current Electric cell Electric switch correct option. D. Electric cell Electric current Electric switch 19th NSO | Class-7 | Set-A | Level 1 | 3 20. Two identical balls are released at the same time from C. Oxygen, butter paper and milk a building of height 85 m, one from the top while the D. Chlorine, glass jar and water. other from half way up. 25. Match the given chemical reactions with the products Which of the following quantities is same for both balls? listed in the box and select the correct option from A. Time of travel B. Final speed the given codes. C. Acceleration D. Total displacement (i)-CaO; (ii)-Mg(OH)2; (iii)-NO2 (iv)-Cu (v)-MgCl2; (vi)-O2; (vii)-Fe2O3; (viii)-CaCO3 21. Which of the following statements is/are correct? I. Coffee is bitter in taste hence, it is basic in nature. P. Mixing magnesium oxide with water II. All mineral acids are strong acids. Q. Brown deposit on iron nail kept in copper sulphate III. Phenolphthalein is a synthetic indicator. solution IV. In neutralisation reaction, heat is always evolved. R. Carbon dioxide is passed through lime water V. If the soil is too basic, organic matter is added to it. S. Absorption of ultraviolet radiations by ozone. A. III, IV and V B. I, III and V A. P-(v), Q-(vii), R-(i), S-(vi) C. I, III and IV D. III only B. P-(iv), Q-(ii), R-(i), S-(iii) C. P-(ii), Q-(iii), R-(viii), S-(vii) 22. Study the given Venn diagram : D. P-(ii), Q-(iv), R-(viii), S-(vi) 26. Study the given flowchart carefully. Points 1, 2, 3 and 4 represent 1 2 3 4 A. Folding a Burning of a A spinning Germina- paper to cracker top tion of make boat seeds P, Q, R and S are respectively B. Growth of Cutting Burning of Melting a plant of a tree cooking gas of ice A. Salt, sawdust, iron dust, camphor C. Setting of Melting Inflation of Tearing a B. Sawdust, iron dust, camphor, salt milk to of ice tyre paper into C. Iron dust, camphor, sawdust, salt form curd pieces D. Camphor, iron dust, sawdust, salt. D. Change of Rising and Bursting of a Burning seasons setting of sun balloon of a candle 27. Kunal has classified a few processes as shown in the given table : 23. Smita took a spoon of turmeric powder and made a paste Type of S.No. Processes by adding little water to it. She cut thin stripes of a change paper and applied this paste on them. After drying I. Sublimation of naphthalene balls Chemical she put few drops of given sample solutions (i)-(iv) II. Heating of sodium with chlorine Physical on these strips. What would be the changes in the gas colour she observed?  III. Mixing sodium hydroxide with Chemical Sample solution (i) Amla juice copper sulphate solution Turmeric paper IV. Expansion of bimetallic strip Chemical (ii) Lime water (iii) Common salt solution V. Extraction of a metal by electrolysis Physical (iv) Baking soda solution The processes which are classified incorrectly are A. (i)-Yellow, (ii)-Red, (iii)-Yellow, (iv)-Red A. II, IV and V only B. III and V only B. (i)-Red, (ii)-Yellow, (iii)-Yellow, (iv)-Red C. I, II, IV and V only D. All of these. C. (i)-Red, (ii)-Red, (iii)-Yellow, (iv)-Yellow D. (i)-Yellow, (ii)-Yellow, (iii)-Red, (iv)-Red 28. During the science activity, class teacher arranged the test tubes as shown in the figure and asked students 24. The properties of substances X, Y and Z are given as : to predict the effect of various indicators on the given X : Gas, transparent, colourless solutions. Y : Solid, translucent, insulator Z : Liquid, opaque, edible Soap Cold Soda ash 10 mL NaOH X, Y and Z are respectively solution drink + water + 10 mL HCl A. Water vapour, petrol and mercury B. Fog, frosted glass and muddy water (1) (2) (3) (4) Which of the following statements are correct? 4 | 19th NSO | Class-7 | Set-A | Level 1 I. Turmeric solution will turn red in test tubes C. Plant R possesses special leaf modifications to catch 1 and 4. and digest insects. II. Methyl orange will turn yellow in test tubes D. Plant S possesses stilt roots which help in aeration. 1 and 3. 32. Refer to the given food web. III. China rose indicator will turn dark pink in test tube 2. IV. Blue litmus solution will turn red in test tubes 1 and 4. A. I and IV only B. I, II and IV only C. II and III only D. None of these Which of the following holds true regarding this? 29. Refer to the given figure and select the correct option. A. There are four primary consumers and one secondary consumer in the given food web. A. Joint X is similar to joint Y X whereas joint W is similar to joint B. There are two herbivores and two carnivores in the Z. Y given food web. B. Joints U and V are fixed joints W C. Snake is serving as both primary and secondary U consumer in this food web. where bones do not show movement. D. If grasshopper and beetle population is removed Z C. Joints Y and Z allow movement from this community then frog population will be in only one plane, i.e., either back affected negatively. V and forth or up and down. 33. Two friends Rohan and Ravi visited a general physician D. None of these for their respective diseases. Doctor examined them and prepared a chart as shown below to keep a record 30. Refer to the given figure and select of their illness. the correct option regarding P, Q, P R Name of Symptoms Treatment R, S and T. the patient of disease A. In pea, R is modified into Q S Rohan Spongy and Intake of citrus tendril to give support bleeding gums fruits and amla whereas in Venus flytrap, S Ravi Body fatigue, Intake of green is modified to catch insects. paleness of leafy vegetables B. R is modified into spines to face and nails (like spinach) and T prevent water loss whereas red meat S performs photosynthesis Refer to the given chart and select the correct option in Opuntia. regarding this. C. T is modified to store food in turnip and A. Rohan is suffering from deficiency of a fat soluble ginger whereas outer covering of P is edible in vitamin which helps in formation of bones and cardamom. teeth. D. Q is modified to store food in cabbage, broccoli B. Ravi is suffering from deficiency of a mineral that is and lettuce. required for formation of haemoglobin that carries 31. Refer to the given flow chart and select the correct oxygen from lungs to body cells. option regarding P, Q, R and S. C. Rohan is suffering from deficiency of a mineral that also increases immunity against various diseases. D. None of these 34. Read the following statements carefully and select the option which correctly identifies the true (T) and false (F) statements. (i) Synthetic fibres are the fibres that are made from chemicals. (ii) Cashmere wool is obtained from cashmere rabbit. (iii) Anthrax is an occupational disease caused by a bacteria Bacillus anthracis. A. Plant P derives nutrition from the host plant with the (i) (ii) (iii) help of haustoria and possesses hygroscopic roots A. T F T which absorb moisture directly from atmosphere. B. F F T B. Plant Q possesses broad thin leaves with superficial C. T T F stomata. D. F T T 19th NSO | Class-7 | Set-A | Level 1 | 5 35. Farheen soaked some bean seeds in water overnight. 38. Digestive juices were collected from three different Next morning she drained the water and kept the seeds regions of the alimentary canal. Drops of these juices moist till they started germinating. She boiled half of were added to wells made in an agar of starch as shown the seeds and then kept the germinating seeds in one below. thermos flask X and the boiled seeds in another thermos flask Y. She covered the mouth of both flasks with moist After an hour, the wells were rinsed with distilled cotton wool. Then she inserted thermometers in both water and flooded with iodine solution. The results flasks and left them. What would be her observation are shown below. after four hours? Well 1 2 3 A. Temperature of flask X increases because it has Colour of iodine Blue-black Yellow - Yellow - photosynthesising seeds. solution brown brown B. Temperature of flask X increases because it has Which of the following correctly identifies the regions respiring seeds. of the alimentary canal from which the three digestive C. Temperature of flask Y increases because it has juices were obtained? boiled seeds. Well 1 Well 2 Well 3 D. Both B and C A. Mouth cavity Small intestine Stomach 36. Refer to the given dichotomous key. B. Mouth cavity Stomach Small intestine C. Small intestine Mouth cavity Stomach I. (a) Fibre obtained from natural resources – Go to II (b) Fibre obtained from chemicals – P D. Stomach Mouth cavity Small intestine II. (a) Plant fibre – Go to III 39. Refer to the given diagram which (b) Animal fibre – Go to IV shows a test tube containing blood III. (a) Fibre obtained from seeds of plants – Q with its components arranged Layer X (b) Fibre obtained from stem of plants – R in layers (X, Y and Z ) after it Layer Y IV. (a) Fibre obtained from mammal – S had been stirred thoroughly for Blood Layer Z 5 minutes in a process known as (b) Fibre obtained from insect – T centrifugation. Which of the following is incorrect regarding P, Q, (In centrifugation, the heavier components sink to the R, S and T ? bottom of the test tube while the lighter components A. P is a petroleum based fibre which does not absorb rise towards the surface). water readily. Now, select the correct statement regarding layers X, B. Both fibres Q and S are obtained from their source Y and Z. organisms without harming them. A. Layer X represents blood plasma, layer Y is chiefly C. Q is separated from seeds by retting whereas R is constituted by red blood corpuscles whereas layer separated from stems by ginning. Z contains blood platelets. D. S can be obtained from the same animal again and B. Layer Y would be absent or greatly reduced in case again whereas T can be obtained from an animal of blood sample obtained from person whose blood only once in its lifetime. does not clot easily. C. Layer Z is chiefly composed of water, enzymes, 37. The given diagram shows percentage composition of hormones etc. gases P, Q, R and other gases present in air. D. Layer X possesses haemoglobin responsible for oxygen transport in human body. Q P R 40. Shruti planted many plants belonging to two separate Other gases species X and Y in her garden. She watered them regularly and took proper care of them. Plants of both species flowered. After sometime Shruti noticed Which of the following statements is correct regarding that only plants belonging to species X yielded fruits gases P, Q and R? whereas fruit setting was absent in plants of species (i) P can be fixed in soil by certain bacteria present in Y. What could be the probable reason for this? roots of leguminous plants. A. Plants of species X are wind pollinated but plants (ii) P supports combustion whereas Q and R help in of species Y are insect pollinated. extinguishing fire. B. Species X is dioecious whereas species Y is (iii) Plants and animals release R in respiration whereas monoecious. plants use Q in photosynthesis. C. Plants of species Y present in Shruti's garden are (iv) R entraps sun's heat and makes earth warm and dioecious male plants. hospitable. D. Plants of species X bear only unisexual female A. (i) and (iv) only B. (ii) and (iii) only flowers whereas plants of species Y bear bisexual C. (i), (ii) and (iv) only D. (iii) only flowers. 6 | 19th NSO | Class-7 | Set-A | Level 1 41. The leaves of a green bean  B. Soil sample having almost same amount of Y plant were exposed to and Z and comparatively much less amount of X carbon dioxide containing has highest percolation rate and water absorbing the radioactive isotope of capacity. carbon 14 C for few hours C. Soil containing more amount of Z and very little X in sunlight. and Y is prominent in areas where Kangaroo rat and A section of the plant's stem was then immediately Acacia are commonly found. obtained and placed on an X-ray film that blackens D. The space between particles is very large in X where exposed to radioactivity. The following however particles are small sized and compactly diagrams show the cross-section of the stem, and the arranged in Y and Z. resulting autoradiograph. Why is structure P shown radioactive? 44. Read the given paragraph with few blanks. A. P transported radioactive carbohydrates from leaves (i) body of birds reduces resistance offered by wind. to other plant parts. Their (ii) are modified into wings which help them B. Radioactive carbon dioxide gets dissolved in in flight. Birds have (iii) bones which make their cell sap and is transported along with water and body light. Birds are (iv) and maintain constant body minerals by structure P. temperature. (v) are attached to their lungs which C. The radioactive carbon is incorporated only in the serve as reservoirs of air. Birds maintain equilibrium tissues constituting structure P. D. None of these in flight due to well developed (vi) of brain. Select the option that correctly fills any 3 of these 42. Refer to the given Venn diagram blanks. and identify P, Q, R and S. A. (i) Spindle shaped, (ii) Hindlimbs, (vi) Cerebrum A. P – Paramecium, B. (ii) Forelimbs, (iv) Homeothermic, (vi) – Cerebellum Q – Scoliodon, R – Spiny C. (i) Radially symmetrical, (iii) Pneumatic, (v) Air sacs ant eater, S – Lung fish D. (iv) Poikilothermic, (v) Air sacs, (vi) Cerebrum B. P – Lion tailed macaque, Q – Salmon, R – Dolphin, 45. Read the given paragraph. S – Platypus X, Y and Z are three methods of waste management. X C. P – Earthworm, Q – Rohu, R – Blue whale, requires action of biological agents whereas Y and Z S – Frog are chemical processes. Both X and Y reduce the waste D. P – Amoeba, Q – Tadpole, R – Trout, S – Snake volume whereas Z makes the waste reusable. 43. A handful of soil was mixed in water Which of the following is incorrect regarding X, Y and Z ? and left in a jar for some time. Different A. X enriches the soil with nutrients and helps in components of soil got segregated and recycling of matter between living organisms and formed layers, as shown in the given X their environment. figure. Y B. Y generates gases and heat energy and is best suited Select the correct option regarding Z for disposing toxic waste. layers X, Y and Z. C. Z increases the demand and supply of fresh raw A. Soil sample having high amount of X material and causes air and water pollution. than Y and Z is best suited for maize cultivation. D. Saprophytes and detritivores play a major role in X. Achievers Section 46. Observe the given figure carefully and fill in the blanks 47. Which of the following statements is correct for the by choosing an appropriate option. given circuit diagram? p q r s A. Crystallisation Iron Chemical, Iron A. To convert the electrical energy into heat energy, reversible oxide only switch R should be closed. B. Sublimation Zinc Physical, Zinc B. Minimum number of switches needed to be closed irreversible oxide for conversion of electrical energy to sound energy C. Melting Copper Physical, Copper is two. reversible oxide C. To convert the electrical energy to light energy, only D. Crystallisation Iron Chemical, Copper switches S and Q should be closed. irreversible 19th NSO | Class-7 | Set-A | Level 1 | 7 D. If electrical energy is being converted to sound Most absorption of water occurs in large intestine. energy and heat energy, then conversion to light Select the correct option regarding this. energy is also taking place. A. Two should be replaced by four whereas proteins 48. Refer to the given food web. should not be replaced as it is correctly mentioned. B. Fats should be replaced by carbohydrates and pancreas should be replaced by liver. C. Digests should be replaced by emulsifies. D. Large should be replaced by small. Which of the following graphs best illustrates changes in 50. Refer to the given diagram showing a natural cyclic fish and penguin population over time if whale population process. is removed from this community? Process III Y IV X ces s Population size I Population size Population size Pro cess Pro A. B. Pro ces s II Time Time Population size C. D. Process V Time Time Which of the following holds true regarding it ? 49. Read the given paragraph where few words have been A. Deforestation will decelerate process V. italicised. B. Process I occurs at a high rate in a rainforest and is Buccal cavity of humans contains two pairs of salivary absent in deserts whereas process III is involved in glands which secrete digestive juices that help in dew formation. digestion of proteins present in food. From here food C. The physical state of water at X is liquid and that at enters stomach where digestion of mainly fats takes Y is gaseous. place. As this semi-digested food enters small intestine D. Both processes II and IV involve conversion of one complete digestion of food occurs. Small intestine physical state of water into another. receives bile juice from pancreas which digests fats. SPACE FOR ROUGH WORK 8 | 19th NSO | Class-7 | Set-A | Level 1 Class 7 19th Set B Year 2016 logical reasoning 1. Pointing to a photograph, Mini said, "She is the mother of my only brother's uncle's son." How is Mini related C. D. to the person in the photograph? A. Aunt B. Niece 6. Ahika is standing to the North of Sumit. Priyanka is C. Mother standing to East of Ahika. Puneet is to the West of D. Daughter Sumit. What is the position of Puneet with respect to Priyanka? 2. Select a figure from the options which will substitute A. West the (?) so that a series is formed by the Problem B. South-West Figures. C. South D. North-West 7. Select the correct water image of the given combination of letters and numbers. 5N6OMAT A. A. B. B. C. D. C. D. 8. Three of the following four groups of letters are alike in some away while one is different. Find out which one is different. 3. How many such 4's are there in the following sequence A. AGDKB that the sum of the immediately following two digits B. CIFMD is greater than the sum of the immediately preceding C. EKHOF two digits? D. JPMSK 9 2 4 4 5 4 7 4 2 9 8 7 4 7 3 4 5 2 1 4 1 3 4 4 4 9. Which of the following Venn diagrams correctly 8 7 3 3 9 1 1 4 2 1 represents the relationship amongst "Rivers, Oceans, A. 7 Water sources"? B. 6 C. 5 D. 4 A. B. 4. If it is possible to make a meaningful word with the first, fourth, fifth and eighth letters of the word C. D. HYPOTHESIS which of the following will be the third letter of that word ? If more than one such word can be formed, give 'X' as the answer. If no such word 10. Select the option in which only specified components can be formed, give 'M' as the answer. of the Fig. (X) are found. A. M B. X C. S D. T 5. In which of the following options, Fig. (X) is exactly embedded as one of its part? A. B. A. B. C. D. 2 | 19th NSO | Class-7 | Set-B | Level 1 SCIENCE 11. Which of the following diagrams best depicts the If an observer peeps through the hole at the mirror, the situation when two long iron rods are placed at the extent to which he can see the metre ruler is between ends of a very short bar magnet? the_________. A. 0 cm and 90 cm mark A. B. B. 10 cm and 70 cm mark C. 20 cm and 50 cm mark D. 15 cm and 60 cm mark C. D. 16. Two parallel rays of light strike a convex lens. Which of the following correctly shows the passage of the rays after passing through the lens? 12. The end of a cyclone comes quickly if the cyclone moves over A. Sea B. Lake A. B. C. Land D. Cloud. 13. Four magnetic materials are used to pick up metallic paper clips after they were taken out from a coil which is connected to a strong direct current. The numbers of paper clips picked up by the four magnetic materials C. D. are listed here: Number of paper clips Magnetic material 17. Some steamboat restaurants use  Paper picked up paper pots for their customers to pot P 0 heat the food themselves. What Q 5 Flame is the reason for the paper not to R 10 catch fire when in contact with the S 20 flame? Which is the best magnetic material to be used as an (i) The paper is thin and therefore heat is conducted electromagnet? quickly to the water in the paper pot. A. P B. Q (ii) Water has a boiling point lower than the burning C. R D. S temperature of the paper. 14. Which of the following statements does not illustrate (iii) The paper is thick enough to withstand the high uniform motion? temperature of the flame. A. (i) and (ii) only B. (i) and (iii) only A. A boy runs 80 m along a straight track at a constant speed. C. (ii) and (iii) only D. (i), (ii) and (iii) B. A stone is thrown upwards with a speed of 18. Study the classification carefully and select the correct 10 m s–1. option for X, Y and Z. C. A ball moves along a frictionless surface without Electrical Energy any external force. D. An aeroplane flying with a constant speed of Television Electric bulb Toaster Radio Torch light Rice cooker 250 m s–1 at an altitude of 1000 m. X Y Z 15. The diagram shows a metre ruler XY with a small X Y Z hole drilled at the 30 cm mark. A plane mirror MN A. Refrigerator Clock Microwave is placed in front of the ruler and is parallel to it. B. Music system Washing machine Heater C. Walkman Table lamp Electric kettle D. Air-conditioner Heater Hair drier 19. The length of mercury thread in a mercury thermometer is 2 mm at the ice point and 26 mm at the boiling point of water. What will be the length of mercury thread in this thermometer if it is used to measure a temperature of 75°C? A. 18 mm B. 20 mm C. 22 mm D. 24 mm 19th NSO | Class-7 | Set-B | Level 1 | 3 20. The given diagram shows a B. Components will mix well in beakers III and IV ball released from the top of as they are completely miscible. a smooth ramp, which reaches C. Vinegar will disappear completely in beaker II as a flat and smooth horizontal it is a miscible liquid. surface connected to the ramp. D. Cooking oil will form a separate layer below water Which of the following speed-time graphs best in beaker IV. represents the motion of this ball? Speed Speed 24. Which portion of the ship P will rust the fastest? A. B. A. P  Q R B. Q Time Time C. R Speed Speed D. P, Q and R will rust equally. C. D. 25. The given table shows the properties of four substances K, L, M and N : Time Time Substance Colour Nature Magnetic Dissolves 21. Ms. Kritika, a science teacher demonstrated an activity in water in the class. She burnt a thin strip of magnesium and K White Salty No Yes collected the powdery ash in a China dish. Then she L Blue Sweet No No mixed some water and tested the mixture with various M White Sweet No Yes indicators. N Black Metallic Yes No Which of the following observations are correct? Which two substances would be most difficult to separate when mixed in water? I. The colour of China rose indicator changed to A. K and L B. K and M green. C. L and M D. M and N II. The colour of turmeric paper changed to blue. III. Red litmus changed to blue. 26. Consider the following statements : IV. Colour of methyl orange changed to yellow. I. Baking soda is an acidic salt whereas common salt A. I, III and IV only B. II and III only is a basic salt. C. III and IV only D. I and II only II. The water extract of spinach does not change the colour of red litmus solution. 22. The given diagram shows burning of sulphur : III. Organic matter neutralises the acidic nature of After heating sulphur the soil. for few minutes, it melts Sulphur IV. Lime water is acidic in nature. (process I) and then The incorrect statement(s) is/are vaporises (process II). After Bunsen burner A. I, II and IV only B. II, III and IV only this, vapour ignite and burn C. I, III and IV only D. II only. with oxygen to form sulphur Splinter burning dioxide (process III). 27. Observe the given figure  with a pop sound r Identify the types of changes taking place in these carefully and identify the processes. substances marked as p, q q A. Processes I and III are chemical changes while II and r. p is a physical change. p q   r B. Processes II and III are chemical changes while I A. Baking soda Vinegar Carbon dioxide is a physical change. B. Magnesium Hydrochloric Chlorine C. Process III is a chemical change while processes acid I and II are physical changes. C. Calcium Hydrochloric Carbon dioxide D. All are chemical changes. carbonate acid D. Zinc Hydrochloric Hydrogen 23. The following activity was performed to check the acid solubility of various liquids in water : 28. Study the given Venn diagram : Lemon Vinegar Petrol Cooking juice oil (I) (II) (III) (IV) Which of the following observations is correct? A. Two separate layers will be formed in beakers I and II and liquids are completely miscible. Centre point 'P' represents 4 | 19th NSO | Class-7 | Set-B | Level 1 A. Rusting of iron 32. Divya set up an experiment Thermometer B. Eruption of volcanoes in an open field as shown here to C. Ripening of a fruit study how temperature affects Inverted the rate of photosynthesis. She test tube D. Burning of cooking gas. left the apparatus in field from 7 am in the morning till 1 pm Funnel 29. The given table classifies five animals P, Q, R, S and Pond T according to their feeding habits. These animals in afternoon and tabulated her weed live in the same habitat. observations which were later Plasticine support plotted on a graph. Carnivore Herbivore Omnivore Which of the following graphs shows the result of S R P her experiment? T Q Number of bubbles 10 Number of bubbles 10 8 Which of the following shows their correct interlinking 8 A. 6 B. 6 4 with respect to their feeding habits ? 4 2 2 0 Plant R 0 20 2530 35 40 455055 20 2530 35 40 455055 Temperature (°C) Temperature (°C) A. B. P Number of bubbles 10 T Q S 8 C. 6 D. P Plant Q Plant R P 4 2 0 C. D. 20 2530 35 40 455055 Q Temperature (°C) R S T S T 33. Refer to the given flow chart and identify P, Q, R, S 30. The given table shows some observations of food test and T. experiments. Food sample Test W X Y Z (i) Iodine test Brown Brown Bluish- Brown black (ii) Benedict's Orange Blue Blue Blue test (iii) Copper sulphate Blue Purple Blue Purple + Caustic soda test (iv) Ethanol test Colourless Emulsion Colourless Colourless A. P - Pea, Q - Opuntia, R - Aloe, S - Utricularia, Which of the following correctly identifies W, X, Y T - Lettuce and Z? B. P - Grapevine, Q - Acacia, R - Coleus, S - A. W – Sugar, X – Egg, Y – Potato, Z – Soyabean Dionaea, T - Passion flower C. P - Gloriosa, Q - Aloe, R - Opuntia, S - Nepenthes, B. W – Pulses, X – Cabbage, Y – Butter, Z – Jam T - Bryophyllum C. W – Milk, X – Orange, Y – Peanuts, Z – Paneer D. P - Bottle gourd, Q - Cactus, R - Asparagus, D. W – Cheese, X – Potato, Y – Honey, Z – Meat S - Drosera, T - Coleus 31. Refer to the given Venn diagram and select the correct 34. The given graph shows the statements regarding X, Y and Z. amount of water absorbed by four (i) X could be Scoliodon, Z fabrics P, Q, R and S of same Y could be pigeon and Exoskeleton Body is size when put in four separate comprises X streamlined beakers each containing 100 mL Z could be tortoise. scales Y (ii) Y is warm blooded of water. Identify P, Q, R and S and select the incorrect option whereas X and Z are Exoskeleton comprises regarding them. cold blooded animals. feathers A. R can be worn close to skin because static (iii) X could be a fish or a reptile. electricity does not build up readily. (iv) Y possesses hollow bones and air sacs. B. Fibres of Q consist of keratin protein, fibres of S (v) X has two chambered heart, Y has three chambered consist of fibroin protein, fibres of R are cellulosic heart and Z has four chambered heart. in nature whereas fibres of P are obtained from A. (i) and (iv) only petrochemicals. B. (i), (ii), (iii) and (iv) only C. Fibre of S is the strongest natural fibre. C. (ii), (iv) and (v) only D. Fibres of P and Q are animal fibres whereas fibres D. (i), (ii) and (v) only of R and S are plant fibres. 19th NSO | Class-7 | Set-B | Level 1 | 5 35. Read the given statements and select the option which D. P could be plastic bag or styrofoam cup whereas correctly fills the blanks in any two of these statements. Q could be vegetable peel or tea leaves. (i) Paramecium has stiff hair-like structures called _______ all over its body, which are used for 39. Siddhi set up an experiment as shown here to investigate _______. fermentative activity in yeast. (ii) Hydra has a number of _______ around its mouth, that entangle small aquatic animals and kill them with their _______ cells. (iii) Frog uses its long, sticky_______ to catch insects. (iv) Mosquito sucks up the blood of animals with its _______. A. (ii) - Cilia, Absorptive; (iii) - Limb B. (i) - Tentacles, Ingestion; (iv) - Feeding tube Which of the following holds incorrect regarding the C. (i) - Cilia, Ingestion; (ii) - Tentacles, Stinging given experiment? D. (iii) - Tongue; (iv) - Pseudopodia A. The balloon of setup II got inflated due to 36. Your mother goes to buy a woollen shawl from the accumulation of a gas which gives white precipitate market. The shopkeeper takes out a small strand of yarn when bubbled through calcium hydroxide from the shawl and burns it. It smells like a burning solution. plastic. Will it be a good decision to buy this shawl B. The balloon in setup I does not inflate as boiled and why? yeast cannot respire. A. Yes, as it is a characteristic of pure wool. C. Most of the sugar solution is converted to ethyl B. No, as it is a characteristic of synthetic yarn. alcohol in setup II due to anaerobic respiration of C. Yes, as it is a characteristic of pure silk. yeast. D. No, as it is a characteristic of cotton. D. In setup I, yeast respires only aerobically whereas 37. Refer to the given flow chart and select the correct in setup II yeast undergoes both aerobic and option regarding P, Q, R and S. anaerobic respiration. Food item Yes 40. Refer to the given flow chart and select the correct option regarding W, X, Y and Z. Obtained from plants Yes Human blood Yes Rich in carbohydrates P No W Corpuscles Yes Contains Rich in fats Q X Y Z No mostly water Yes Rich in iron R Transports oxygen Fights Forms clots No throughout infection and prevents Yes body blood loss Rich in vitamin C S A. P could be honey or sugarcane whereas Q could A. X is enucleated, biconvex and contains red pigment be soyabean or maize. haemoglobin. B. X count goes up in case of anaemia whereas Y B. R should be taken in large quantities by patients count goes down in case of common cold. suffering from goitre. C. Z can change its shape and shows amoeboid C. Deficiency of S leads to bleeding gums and swelling movements. of joints. D. X, Y and Z remain suspended in W along with D. Q should be taken in large quantities by patients enzymes, proteins, hormones, etc. suffering from kwashiorkor. 41. Refer to the given dichotomous key and identify 38. The given graph shows the changes P, Q, R and S. in amount of solid wastes P and Q dumped on an open ground over I. (a) It is a flowering plant. - Go to II time. (b) It is a non - flowering plant. - Go to III Select the correct statement regarding P and Q. II. (a) Propagates vegetatively by leaves. – P A. Q could be vermicomposted or burnt. (b) Propagates vegetatively by stem. – Q B. Hospital waste belonging to category P is III. (a) Reproduces asexually by fragmentation. – R recycled whereas that belonging to category Q is incinerated. (b) Reproduces asexually by spores. – S C. Reduction in amount of P with time is synchronised A. P - Bougainvillea, Q - Poppy, R - Sphagnum, with nutrient enrichment of ground soil. S - Spirulina 6 | 19th NSO | Class-7 | Set-B | Level 1 B. P - Begonia, Q - Strawberry, R - Spirogyra, B. In areas experiencing extremes of temperature, S - Marchantia contraction and relaxation of rocks aids in Z. C. P - Bryophyllum, Q - Passion flower, C. Phenomenon X can be checked to some extent by R - Chrysanthemum, S - Funaria terrace and contour farming. D. P - Bottle brush, Q - Dahlia, R - Candytuft, D. Y could be afforestation, floods or forest fire. S - Jasmine 44. Which of the following is not true regarding the 42. Refer to the given diagram and select the correct adaptations shown by different animals? option regarding processes P, Q and R. A. Jaguar has spotted skin, which merges well with the speckled shadows of the rainforest floor, making it difficult to be spotted. B. Toucan uses its long, large bill to reach fruits on weak branches that cannot bear its weight. C. The lion-tailed macaque has long and sticky tongue which helps it to catch insects. D. Seals have a thick deposition of fat called blubber A. Processes P, Q and R introduce genetic variability that protects them from cold. in the offspring of sexually reproducing plants X and Y. 45. The given graph shows changes in the volume of thoracic B. Wind serves as agent for processes P and Q in cavity in a normal human being while breathing. case plants X and Y belong to genus Salvia. C. Flowers of plant X and Y need to produce odour and nectar for completion of processes P and Q if they are rose species. D. If plants X and Y are of maize species, then their flowers need to produce sticky and heavy pollens in very small amount for accomplishment of process Select the correct option regarding this. Q. A. From X to Y, pressure in lungs increases whereas from Y to Z pressure in lungs decreases. 43. Read the given paragraph. B. From X to Y, ribs move upward and outward X is a natural phenomenon which causes soil erosion whereas from Y to Z ribs move downward and mostly in hilly areas whereas Y is an anthropogenic inward. cause contributing to erosion. However, Z is a natural C. At point Y diaphragm is dome shaped whereas at phenomenon contributing to soil formation. points X and Z it is flat. Select the incorrect option regarding X, Y and Z. D. X to Y represents exhalation and Y to Z represents A. Lichens are biological agents responsible for phenomenon Z. inhalation. Achievers Section 46. The diagram shows three identical light bulbs X, Y 47. Some examples of common household items are and Z, connected in a circuit. given : (a) Soda water (b) Sour milk (c) Sugar solution (d) Window cleaner (e) Toothpaste (f) Common salt solution Fillin the blanks by choosing an appropriate option. What will happen to the brightness of the bulbs With solutions I methyl orange changes to red colour, if a similar bulb is connected in series with the bulb with solutions II China rose indicator changes to X? green colour while with solutions III red or blue litmus   X   Y   Z paper do not show any colour change. A. Dimmer Dimmer Brighter A. I – (c), (d); II – (f), (e); III – (a), (b) B. Dimmer Brighter Dimmer B. I – (a), (b); II – (d), (e); III – (c), (f) C. Brighter Dimmer Brighter C. I – (d), (f); II – (c), (b); III – (a), (e) D. Brighter Brighter Dimmer D. I – (a), (e); II – (b), (d); III – (c), (f) 19th NSO | Class-7 | Set-B | Level 1 | 7 48. Refer to the given figure of human removed. Then water is allowed to go into grit tank digestive system and select the where speed of waste water is increased so that light correct statements regarding parts objects settle at bottom. Then water enters sedimentation labelled P, Q, R and S. tank where sludge sinks slowly at the bottom which is (i) P and R secrete and pour continuously removed by skimmer. Water then enters their digestive enzymes in aeration tank which contains anaerobic bacteria. Q for digestion whereas Q Select the correct statement regarding this. secretes HCl which kills A. Bar screen should be replaced by digester and germs in food. liquid should be replaced by solid. (ii) Digestion of both carbohydrates and proteins takes B. The positions of grit and aeration should be place in Q whereas digestion of only fats takes interchanged. C. Increased and light should not be replaced as they place in S. are correctly mentioned. (iii) Q, R and S secrete digestive enzymes but P only D. Skimmer should be replaced by scraper and stores a digestive juice that emulsifies fats. anaerobic should be replaced by aerobic. (iv) S does not secrete any digestive enzyme but receives digestive enzymes of P, Q and R for complete 50. Refer to the given food web and select the correct digestion of food. option regarding it. (v) If P is removed in a person then he cannot digest fats present in his food. (vi) Q secretes digestive enzymes and mucus whereas R secretes digestive enzymes and hormones. A. (ii), (iv) and (v) only B. (iii) and (vi) only C . (iv), (v) and (vi) only D. (i), (iii) and (v) only A. There are 8 food chains in the given food web. 49. Read the given paragraph where few words have been B. There are 4 primary consumers and 3 secondary italicised. consumers in this food web. Waste water treatment plant involves physical, chemical C. Owl and wolf serve as secondary as well as top consumers in the given food web. and biological processes. First the waste water is made D. There are only two top consumers in the given to pass through bar screen where liquid materials are food web. SPACE FOR ROUGH WORK 8 | 19th NSO | Class-7 | Set-B | Level 1 Answer Keys 15th nso SET A 1. (B) 2. (C) 3. (B) 4. (D) 5. (A) 6. (B) 7. (C) 8. (A) 9. (D) 10. (D) 11. (C) 12. (C) 13. (C) 14. (D) 15. (C) 16. (C) 17. (D) 18. (C) 19. (D) 20. (A) 21. (B) 22. (C) 23. (D) 24. (C) 25. (D) 26. (B) 27. (B) 28. (C) 29. (C) 30. (C) 31. (A) 32. (C) 33. (A) 34. (A) 35. (C) 36. (D) 37. (B) 38. (B) 39. (C) 40. (C) 41. (A) 42. (D) 43. (A) 44. (A) 45. (A) 46. (D) 47. (B) 48. (C) 49. (B) 50. (B) SET B 1. (C) 2. (A) 3. (B) 4. (B) 5. (B) 6. (B) 7. (C) 8. (D) 9. (D) 10. (D) 11. (B) 12. (C) 13. (C) 14. (B) 15. (B) 16. (A) 17. (A) 18. (A) 19. (C) 20. (C) 21. (B) 22. (A) 23. (B) 24. (A) 25. (D) 26. (A) 27. (A) 28. (B) 29. (A) 30. (D) 31. (A) 32. (D) 33. (D) 34. (B) 35. (B) 36. (D) 37. (B) 38. (D) 39. (C) 40. (B) 41. (B) 42. (A) 43. (C) 44. (D) 45. (C) 46. (D) 47. (C) 48. (A) 49. (C) 50. (B) 16th nso SET A 1. (C) 2. (A) 3. (D) 4. (B) 5. (A) 6. (A) 7. (B) 8. (B) 9. (D) 10. (B) 11. (A) 12. (B) 13. (B) 14. (C) 15. (C) 16. (D) 17. (B) 18. (B) 19. (C) 20. (A) 21. (B) 22. (C) 23. (C) 24. (B) 25. (C) 26. (D) 27. (A) 28. (A) 29. (B) 30. (B) 31. (A) 32. (C) 33. (C) 34. (C) 35. (B) 36. (D) 37. (B) 38. (D) 39. (B) 40. (C) 41. (C) 42. (D) 43. (C) 44. (B) 45. (C) 46. (C) 47. (C) 48. (C) 49. (A) 50. (D) SET B 1. (D) 2. (D) 3. (A) 4. (A) 5. (D) 6. (A) 7. (C) 8. (A) 9. (B) 10. (D) 11. (B) 12. (C) 13. (C) 14. (C) 15. (A) 16. (D) 17. (A) 18. (B) 19. (C) 20. (A) 21. (D) 22. (D) 23. (A) 24. (A) 25. (C) 26. (C) 27. (C) 28. (D) 29. (C) 30. (C) 31. (C) 32. (A) 33. (B) 34. (D) 35. (A) 36. (C) 37. (D) 38. (C) 39. (C) 40. (D) 41. (A) 42. (A) 43. (B) 44. (D) 45. (D) 46. (B) 47. (A) 48. (A) 49. (A) 50. (D) 17th nso SET A 1. (D) 2. (A) 3. (D) 4. (B) 5. (B) 6. (A) 7. (C) 8. (A) 9. (B) 10. (C) 11. (A) 12. (C) 13. (A) 14. (A) 15. (C) 16. (C) 17. (C) 18. (D) 19. (B) 20. (B) 21. (C) 22. (B) 23. (C) 24. (B) 25. (D) 26. (A) 27. (D) 28. (D) 29. (B) 30. (A) 31. (C) 32. (D) 33. (D) 34. (B) 35. (D) 36. (B) 37. (C) 38. (C) 39. (C) 40. (D) 41. (C) 42. (C) 43. (D) 44. (A) 45. (B) 46. (A) 47. (C) 48. (C) 49. (D) 50. (D) SET B 1. (D) 2. (D) 3. (C) 4. (C) 5. (D) 6. (D) 7. (B) 8. (C) 9. (C) 10. (B) 11. (B) 12. (B) 13. (A) 14. (C) 15. (C) 16. (D) 17. (A) 18. (A) 19. (B) 20. (D) 21. (B) 22. (B) 23. (C) 24. (B) 25. (B) 26. (B) 27. (C) 28. (A) 29. (D) 30. (A) 31. (B) 32. (B) 33. (B) 34. (C) 35. (D) 36. (D) 37. (B) 38. (B) 39. (C) 40. (D) 41. (A) 42. (C) 43. (B) 44. (B) 45. (B) 46. (B) 47. (C) 48. (B) 49. (D) 50. (C) 18th nso SET 1 1. (B) 2. (C) 3. (C) 4. (A) 5. (B) 6. (B) 7. (D) 8. (D) 9. (B) 10. (B) 11. (D) 12. (A) 13. (B) 14. (D) 15. (D) 16. (B) 17. (C) 18. (C) 19. (A) 20. (A) 21. (D) 22. (C) 23. (B) 24. (B) 25. (D) 26. (D) 27. (C) 28. (B) 29. (B) 30. (C) 31. (A) 32. (A) 33. (B) 34. (C) 35. (D) 36. (B) 37. (D) 38. (C) 39. (C) 40. (B) 41. (B) 42. (C) 43. (D) 44. (D) 45. (C) 46. (D) 47. (B) 48. (B) 49. (B) 50. (C) SET 2 1. (B) 2. (C) 3. (D) 4. (D) 5. (C) 6. (C) 7. (B) 8. (D) 9. (D) 10. (A) 11. (A) 12. (D) 13. (B) 14. (D) 15. (B) 16. (D) 17. (D) 18. (B) 19. (B) 20. (B) 21. (B) 22. (B) 23. (C) 24. (A) 25. (C) 26. (B) 27. (C) 28. (D) 29. (B) 30. (B) 31. (D) 32. (D) 33. (A) 34. (D) 35. (B) 36. (D) 37. (B) 38. (A) 39. (B) 40. (C) 41. (B) 42. (D) 43. (D) 44. (A) 45. (C) 46. (B) 47. (C) 48. (B) 49. (D) 50. (A) 19th nso SET A 1. (A) 2. (A) 3. (B) 4. (A) 5. (D) 6. (D) 7. (B) 8. (B) 9. (C) 10. (A) 11. (C) 12. (C) 13. (A) 14. (C) 15. (A) 16. (B) 17. (B) 18. (B) 19. (C) 20. (C) 21. (A) 22. (B) 23. (A) 24. (C) 25. (D) 26. (D) 27. (C) 28. (C) 29. (C) 30. (B) 31. (C) 32. (D) 33. (B) 34. (A) 35. (B) 36. (C) 37. (A) 38. (D) 39. (B) 40. (C) 41. (A) 42. (C) 43. (C) 44. (B) 45. (C) 46. (D) 47. (D) 48. (A) 49. (C) 50. (A) SET B 1. (B) 2. (B) 3. (A) 4. (B) 5. (B) 6. (B) 7. (A) 8. (D) 9. (D) 10. (B) 11. (B) 12. (C) 13. (A) 14. (B) 15. (C) 16. (C) 17. (A) 18. (C) 19. (B) 20. (B) 21. (A) 22. (C) 23. (C) 24. (C) 25. (B) 26. (C) 27. (D) 28. (C) 29. (B) 30. (A) 31. (B) 32. (A) 33. (C) 34. (D) 35. (C) 36. (B) 37. (C) 38. (C) 39. (D) 40. (D) 41. (B) 42. (C) 43. (D) 44. (C) 45. (B) 46. (B) 47. (B) 48. (B) 49. (D) 50. (C)


Comments

Copyright © 2024 UPDOCS Inc.