Class 10 Nso 5 Years eBook

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(2) Copyright © 2015 Science Olympiad Foundation. Printed with the permission of Science Olympiad Foundation. No part. of this publication may be reproduced, transmitted, in any form or by any means, electronic, mechanical, photocopying, recording or otherwise, without the prior permission of the copyright holder. Ownership of an ebook does not give the possessor the ebook copyright. All disputes subject to Delhi jurisdiction only.. Disclaimer : The information in this book is to give you the path to success but it does not guarantee 100% success as the strategy is completely dependent on its execution. And it is based on last years papers of NSO exam.. Published by : MTG Learning Media (P) Ltd. Corporate Office : Plot 99, 2nd Floor, Sector 44 Institutional Area, Gurgaon, Haryana. Phone : 0124 - 4951200 Web: mtg.in Email: [email protected] Regd. Office : 406, Taj Apt., Ring Road, Near Safdarjung Hospital, New Delhi-110029. Visit. www.mtg.in for buying books online..

(3) CLASS 10. Contents ªª 13th NSO 2010 ªª 14th NSO 2011 ªª 15th NSO 2012 - SET A ªª 15th NSO 2012 - SET B ªª 16th NSO 2013 - SET A ªª 16th NSO 2013 - SET B ªª 17th NSO 2014 - SET A ªª 17th NSO 2014 - SET B.

(4) MTG Work-Books / olympiad books CLASS 1. International Mathematics Olympiad. National Science Olympiad. International English Olympiad. MTG CSS Series. CLASS 2. International Mathematics Olympiad. National Science Olympiad. National Cyber Olympiad. International English Olympiad. MTG CSS Series. International English Olympiad. MTG CSS Series. CLASS 3. International Mathematics Olympiad. National Science Olympiad. National Cyber Olympiad.

(5) MTG Work-Books / olympiad books CLASS 4. International Mathematics Olympiad. National Science Olympiad. National Cyber Olympiad. International English Olympiad. MTG CSS Series. International English Olympiad. MTG CSS Series. International English Olympiad. MTG CSS Series. CLASS 5. International Mathematics Olympiad. National Science Olympiad. National Cyber Olympiad. CLASS 6. International Mathematics Olympiad. National Science Olympiad. National Cyber Olympiad.

(6) MTG Work-Books / olympiad books CLASS 7. National Science Olympiad. International Mathematics Olympiad. National Cyber Olympiad. Science IQ Challenge. Math IQ Challenge. International English Olympiad. MTG CSS Series. Master Mental Ability in 30 Days. CLASS 8. International Mathematics Olympiad. National Science Olympiad. National Cyber Olympiad. International English Olympiad. MTG CSS Series. Math IQ Challenge. Science IQ Challenge. Psychology of Success. The Secrets of SUCCESS. Master Mental Ability in 30 Days.

(7) MTG Work-Books / olympiad books CLASS 9. International Mathematics Olympiad. Math IQ Challenge. National Science Olympiad. Science IQ Challenge. National Cyber Olympiad. Psychology of Success. The Secrets of SUCCESS. International English Olympiad. Master Mental Ability in 30 Days. CLASS 10. International Mathematics Olympiad. Math IQ Challenge. National Science Olympiad. Science IQ Challenge. National Cyber Olympiad. Psychology of Success. The Secrets of SUCCESS. International English Olympiad. Master Mental Ability in 30 Days.

(8) MTG Work-Books / olympiad books CLASS 11. International Mathematics Olympiad. Math IQ Challenge. Science IQ Challenge. National Science Olympiad. Psychology of Success. National Cyber Olympiad. The Secrets of SUCCESS. Master Mental Ability in 30 Days. CLASS 12. International Mathematics Olympiad. Math IQ Challenge. Science IQ Challenge. National Science Olympiad. Psychology of Success. National Cyber Olympiad. The Secrets of SUCCESS. Master Mental Ability in 30 Days.

(9) Class. 1 to 10.

(10) JEE (Main & Advanced) | AIPMT | BOARDS | OLYMPIAD | NTSE. FOUNDATION COURSE For Classes 7, 8, 9 & 10 Class 7. Class 8. Class 9. Class 10.

(11) Class 10 13th. Year 2010. Copyright©2015. Science Olympiad Foundation (SOF).

(12) CLASS 10 | 13th NSO -- 2010. MENTAL ABILITY 1. . A triangle has sides 8 cm, 17 cm and 15 cm. The area of the triangle is ________ (A) 50 cm 2 . 2. . (B) 68 cm 2 . (C) 40 cm 2 . (D) 60 cm 2 A . In the adjoining figure, if BO and CO are the bisectors of ÐEBC & ÐDCB respectively the value of ÐBOC is ________ (A) 60° . (B) 120° . (C) 30° . (D) 90° . 60° B 70° 1 . C . 2 . E . D O . A. 3. . What is the area of a right angled triangle if the radius of its circumcircle is 3 cm and altitude drawn to the hypotenuse is 2 cm? (A) 4 3 cm 2 (C) 7 cm 2 . 4. . 9. . (C) 27 cm . (D) 30 cm . (B) 5a + b = 0 . (C) a – 5b = 0 . (D) 5a – b = 0 . (B) –2 < b < 2 . (C) b > 2 . (D) b < – 2 . The 9 th term of an A.P. is 449 and 449 th term is 9. The term which is equal to zero is ________ (A) 501 th . 8. . (B) 26 cm . If the equation x 2 – bx + 1 = 0 does not possess real roots, then ________ (A) –3 < b < 3 . 7. . C . B . If 2x – 3y = 7 and (a + b) x – (a + b – 3) y = 4a + b represent coincident lines, then a and b satisfy the equation ________ (A) a + 5b = 0 . 6. . (D) 6 cm 2 . The areas of two similar triangles DABC and DDEF are 144 cm 2 and 81 cm 2 respectively.  If the longest side of larger DABC be 36 cm, then the longest side of the smaller triangle DDEF is ________ (A) 20 cm . 5. . D . (B) 6.5 cm 2 . (B) 502 th . (C) 508 th . (D) None of these . If tan 2 45° – cos 2 30° = x sin 45° cos 45°, then x = ________ 1 (A) 2 (B) – 2 (C) – 2 . (D) . 1 2 . A number x is chosen at random from the numbers –3, –2, –1, 0, 1, 2, 3. The probability that |x| < 2 is ________ 5 2 3 1 (A) (B) (C) (D) 7 7 7 7 . 10. In the given question, group the given figures into three classes using each figure only once. (A) 7, 8, 9; 2, 4, 3; 1, 5, 6 (B) 1, 3, 2; 4, 5, 7; 6, 8, 9 (C) 1, 6, 8; 3, 4, 7; 2, 5, 9 1 . (D) 1, 6, 9; 3, 4, 7; 2, 5, 8. . 2 . 3 . 4 . 5 . 6 . 7 . 8 . 9 . 11. Find the alternative which contains Fig. (X) embedded in it. Fig. (X) . (A) . 13 th NSO | LevelI | Class 10 . (B) . (C) . 2 . Copyright©2015. Science Olympiad Foundation (SOF). (D).

(13) CLASS 10 | 13th NSO -- 2010. 12. Consider the adjoining diagram : What is the minimum number of different colours required to paint the given figure such that no two adjacent regions have the same colour? (A) 3 . (B) 4 . (C) 5 . (D) 6 . 13. In the given question, a set of figures carrying certain characters is given. Assuming that the characters in the set follow a similar pattern, find the missing character. (A) 35 15 . (B) 48 . 2 . 9 . 80 . (C) 72 . 6 . 5 . 7 . 13 . 65 4 . 16 ? . 6 . 8 . 11 . (D) 120 14. If REQUEST is written as S2R52TU, then how will ACID be written? (A) 1394 . (B) IC94 . (C) BDJE . (D) 1D3E . (C) 5 . (D) 51 . 15. Find the missing number if 17 : 52 : : 1 : ? (A) 3 . (B) 4 . SCIENCE . V . V . V . V . 16. I Fig(I) . I Fig(II) . I Fig(III) . I Fig(IV) . The relation between the potential difference (V) and current (I) across a conductor is correctly represented by ________ (A) Fig(I) . (B) Fig(II) . (C) Fig(III) . (D) Fig(IV) . 17. Optical density of a medium depends on ________ (A) Density of the medium . (B) Thickness of the medium . (C) Velocity of light in that medium . (D) None of these . 18. Two equilateral prisms are arranged as shown in figure such that a ray of white light is incident at point X. The ray of light which emerges out of the prism Q ________ . e l hit W. igh. (A) Will show all the colours of spectrum . (B) Will be white light . (C) Will be orange in colour . (D) Will be dull white in colour . t X . Q P . 19. A long sighted person cannot see objects clearly at a distance less than 40 cm from his eyes. The power of the lens needed by him to read a paper at 25 cm is ________ (A) –2.5 D . (B) +2.5 D . (C) – 6.25 D . (D) +1.5 D . 20. During a planned manoeuvre in a space flight, a freefloating astronaut X pushes another freefloating astronaut Y, the mass of X being greater than that of Y. Then, the magnitude of the force exerted by astronaut X on astronaut Y is ________ (A) Equal to zero . (B) Equal to the force exerted by Y on X . (C) Greater than the force exerted by Y on X . (D) Less than the force exerted by Y on X. 3 . Copyright©2015. Science Olympiad Foundation (SOF). 13 th NSO | LevelI | Class 10 .

(14) CLASS 10 | 13th NSO -- 2010. 21. Read the given statements and mark the correct option. Statement 1 : Fine particles in atmosphere scatter the light of shorter wavelength more. Statement 2 : Sky appears blue. (A) Both statements 1 and 2 are true and statement 2 is the correct explanation of statement 1. (B) Both statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1. (C) Statement 1 is true but statement 2 is false. (D) Statement 1 is false but statement 2 is true. 22. Which of the following is the best thing to do during heavy lightning ? (A) Lying on the ground in an open place (B) Going into the nearest water body (C) Staying indoors away from metallic doors or windows (D) Standing under a tall tree P . 23. Study the diagram carefully and select the correct statement. Q (A) Water flowing through hole 'P' will move a smaller distance as compared Water to that through 'Q' and 'R'. R (B) Water flowing through hole 'Q' will move maximum distance. (C) Water flowing through 'R' will move more distance than 'Q' but less than 'P'. (D) Water flowing through all holes will travel same distance as pressure exerted by a liquid is equal in all directions. DIRECTION : Read the passage carefully and answer Q. nos. 24 and 25. An electric bulb 'P' rated 220 V, 60 W is working at full efficiency.  Another identical bulb 'Q' is connected across the mains as shown here. . 220 V . 24. The total power consumed is ________ (A) 20 W . Bulb Q . Bulb P . Mains . (B) 40 W . (C) 30 W . (D) 70 W . 25. What will be the total power if the bulbs are connected in parallel? (A) 120 W . (B) 60 W . (C) 200 W . (D) 70 W . 26. Match column I with column II and select the correct option from the codes given below. Column I Column II (a) Fleming’s left hand rule (i) Application of electromagnetic induction (b) Fleming’s right hand rule (ii) Direction of magnetic force on a current carrying conductor in uniform magnetic field (c) Solenoid (iii) Similar to bar magnet (d) Electric generator (iv) Direction of induced current. (A) a(ii), b(iii), c(iv), d(ii) (B) a(ii), b(iv), c(iii), d(i) (C) a(iv), b(iii), c(i), d(ii) (D) a(iii), b(i), c(ii), d(iv) 27. A few substances are arranged in order of increasing force of attraction between their particles. Which one of the following represents a correct arrangement? (A) Milk, Sugar, Air . (B) Air, Sugar, Milk . (C) Sugar, Milk, Air . (D) Air, Milk, Sugar . 28. Two mixtures containing mustard oil and water, and carbon disulphide and water are poured into separating funnels and kept undisturbed for some time. Two layers separate out according to their densities. Which of the following observations do you think are correct ? (A) (i) and (ii) . Oil Water . (B) (i) and (iii) (C) (i) and (iv) (D) (ii) and (iii) 13 th NSO | LevelI | Class 10 . Carbon disulphide . Water Oil . (i) . (ii) . Carbon disulphide . Water . Oil . Water . Water . Carbon disulphide . Water . (iii) . 4 . Copyright©2015. Science Olympiad Foundation (SOF). (iv) .

(15) CLASS 10 | 13th NSO -- 2010. 29. Which of the following involves fractional distillation? i. Separation of constituents from liquefied air. ii. Separation of constituents from crude petroleum. iii. Separation of carbon tetrachloride from water. iv. Separation of naphthalene from common salt. (A) i and ii . (B) i and iv . (C) ii and iv . (D) i and iii . 30. 1.2375 g of cupric oxide on being heated in a current of hydrogen, gave 0.9322 g of the metal. In another experiment, 0.9369 g of pure copper was dissolved in nitric acid. Excess of acid evaporated and the residue was ignited. The weight of the cupric oxide left was 1.2469 g. Which law of chemical combination is shown by the above results? (A) Law of constant proportions . (B) Law of multiple proportions . (C) Law of conservation of mass . (D) Law of constant volumes . 31. Read the given statements and mark the correct option. Statement 1 : Only one out of every 12000 alpha particles rebound in Rutherford’s experiment. Statement 2 : Most of the space in the atom is empty. (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. . 32. Match column I with column II and select the correct option from the codes given below. (a) (b) (c) (d) . Column I Electron Proton Nucleus Neutron . (i) (ii) (iii) (iv) . Column II Chadwick J.J. Thomson Goldstein Rutherford . (A) (a) (i), (b) (ii), (c) (iii), (d) (iv) . (B) (a) (ii), (b) (iii), (c) (iv), (d) (i) . (C) (a) (iii), (b) (iv), (c) (i), (d) (ii) . (D) (a) (iv), (b) (i), (c) (ii), (d) (iii) . 33. Out of 4 g of methane and 11 g of CO 2, which has more number of molecules? (A) Methane . (B) Carbon dioxide . (C) Both have equal number of molecules . (D) It is not possible to compare . 34. Solution X is taken into test tube1 and made to react with dilute Thistle funnel Iron stand HCl. Gas Y is evolved in the reaction which is made to pass through Rubber cork the delivery tube into test tube2 having solution Z and a milky Hard glass test tube solution is obtained. What are X, Y and Z respectively ? (A) NaOH, CO 2 , Na 2 CO 3 . Delivery tube . Test tube 2 Gas Y Solution Z . Dilute hydrochloric acid . (B) Ca(OH) 2 , H 2 , Ca(HCO 3 ) 2 . Substance X . (C) Ca(OH) 2 , CO 2 , CaCO 3 . Test tube 1 . (D) CaCO 3 , CO 2 , Ca(OH) 2 35. Which of the following elements does not belong to the same period ? 16 8. (A) . 16 8 . P . (B) . 20 23 P , 19 9 Q, 10 R and 11 S . 19 9 Q . (C) . 20 10 R . 5 . Copyright©2015. Science Olympiad Foundation (SOF). (D) . 23 11 S. 13 th NSO | LevelI | Class 10 .

(16) CLASS 10 | 13th NSO -- 2010. 36. Study the following flow chart and mark the correct options from the given choices to fill (i), (ii), (iii), (iv), (v) and (vi). Organic compounds (Hydrocarbons) Closed chain or Cyclic . Open chain or Aliphatic . (ii) . (A) (B) (C) (D) . (i) Cyclobutane Benzene Butane Butene . (iii) . (ii) Cyclobutene Butene Butene Butyne . Aromatic e.g. (vi) . Alicyclic . Unsaturated e.g. . Saturated e.g. (i) . Saturated e.g. (iv) . (iii) Butane Cyclobutane Butyne Butane . Unsaturated e.g. (v) . (iv) Butene Butyne Cyclobutane Cyclobutene . (v) Butyne Butane Cyclobutene Cyclobutane . (vi) Benzene Cyclobutene Benzene Benzene . (C) Colourless, brown, blue, colourless . Aluminium sulphate solution . (D) Colourless, green, blue, colourless . P . Aluminium wire . (B) Colourless, colourless, colourless, colourless . Copper wire . Zinc metal . (A) White, brown, blue, green . Iron nail . 37. Four test tubes P, Q, R and S were taken and filled half with a solution of aluminium sulphate in water.  Clean piece of metal zinc was placed in test tube P, iron nail in test tube Q, copper wire in test tube R and aluminium wire in test tube S.  What colour change will be observed in all the four test tubes respectively ? . Q . R . S . 38. Three students were given colourless liquids of water, lemon juice and a mixture of water and lemon juice. After testing these liquids with pH paper, a sequence in colour change of pH paper was reported. Which is the correct sequence ? (A) Blue, red and green . (B) Orange, green and green . (C) Green, red and red . (D) Red and green I Ethanol + CO  + Energy 2 . 39. Glucose . Pyruvate . II III . Lactic acid +Energy CO  + H O + Energy 2 2 . The above flow chart shows the three steps of glucose breakdown in different conditions. Which of the given steps is responsible for muscle cramps? (A) Step I . (B) Step II . (C) Step III . (D) Both (A) & (B) . 40. The given figure is associated with which of the following types of plant tissues ? (A) Vascular bundle (B) Epidermis (C) Endodermis (D) Pith. 13 th NSO | LevelI | Class 10 . 6 . Copyright©2015. Science Olympiad Foundation (SOF).

(17) CLASS 10 | 13th NSO -- 2010. 41. The given figure shows the pathway taken by a nerve impulse in a reflex action. Which part serves as a link between other neurons ? . Message to brain . P . (A) P (B) Q . Q S . R . (C) R (D) S 42. Each ovule consists of a large oval shaped cell called the embryo sac and the mature embryo sac contains ________ nuclei. (A) Two . (B) Three . (C) Five . (D) Eight . 43. Which of the following conditions will give the most benefits to the farmers? (A) Use of high quality seeds, fertilizers and no irrigation. (B) Use of quality seeds, irrigation, fertilizers and crop protection measures. (C) Use of ordinary seeds, irrigation and fertilizers. (D) Use of quality seeds, irrigation and protection measures. 44. Which of the following is correct about chromosomes? (A) It is composed of DNA and lipids. (B) It is composed of DNA and proteins. (C) It is composed of DNA only. (D) It is composed of RNA and proteins. 45. Which of the following conclusions can be drawn from the given figure ? . Violet flowers ´ White flowers . (A) It shows Mendel's monohybrid cross. F1 generation . (B) The ratio of violet and white flowers is 3 : 1. (C) Violet flowers are dominant. . F2 generation . (D) All of these. 46. Preserved traces of living organisms are called fossils. What type of fossil is shown in the figure ? (A) Fossil of a tree trunk (B) Fossil of Trilobite (C) Fossil of Ammonite (D) Fossil of Knightia . 47. The green plants or producers capture _______ of energy of sunlight that falls on their leaves to prepare food by photosynthesis. (A) 2% . (B) 1% . (C) 10% . (D) 50% . 48. In a grassland ecosystem which of the following groups of animals are likely to occupy the same trophic level ? (A) a, b, c (B) b, c, e (C) c, d, e (D) b, d, e . a . b . c . d . e . 49. Ozone higher up in the atmosphere acts as a shield to prevent UV rays from reaching the Earth's surface. These UV rays are responsible for which of the following diseases? (i) Skin cancer (ii) Eye damage (iii) Lung cancer (iv) Damage to immune system (v) Colour blindness (A) (i), (ii) & (iii) . (B) (i), (ii), (iv) & (v) . (C) (i), (iii), (v) 7 . Copyright©2015. Science Olympiad Foundation (SOF). (D) (i), (ii), (iii), (iv) & (v) 13 th NSO | LevelI | Class 10 .

(18) CLASS 10 | 13th NSO -- 2010. 50. Read the given statements and mark the correct option. Statement 1 : Our main aim of conservation is to preserve the biodiversity. Statement 2 : Loss of biodiversity leads to loss of ecological stability. (A) Both statements 1 and 2 are true and statement 2 is the correct explanation of statement 1. (B) Both statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1. (C) Statement 1 is true but statement 2 is false. . (D) Statement 1 is false but statement 2 is true. . SPACE FOR ROUGH WORK. 13 th NSO | LevelI | Class 10 . 8 . Copyright©2015. Science Olympiad Foundation (SOF).

(19) Class 10 14th. Year 2011. Copyright©2015. Science Olympiad Foundation (SOF).

(20) 2. CLASS 10 | 14th NSO - 2011. MENTAL ABILITY 1.. On a page of a telephone directory, there are 300 telephone numbers. The frequency distribution of the digits at the unit's place is given below : Unit digit. 0. 1. 2. 3. 4. 5. 6. 7. 8. 9. Frequency. 35. 21. 28. 30. 25. 14. 16. 38. 38. 55. Without looking at the page, a number is chosen at random from the page. What is the probability that the digit at the unit's place of the number chosen is greater than 3 but less than 9 ?. (A) 186/300. 2.. A hall-room 39 m 10 cm long and 35 m 70 cm broad is to be paved with equal square tiles. Find the number of tiles required so that the tiles exactly fit.. (A) 483. 3.. 30 trees are planted in a straight line at intervals of 5 metres. To water them, the gardener needs to bring water for each tree, separately from a well, which is 10 metres from the first tree in line with the trees. How far will he have to walk in order to water all the trees beginning with the first tree ? Assume that he starts from the well.. (A) 4785 metres. 4.. If every side of a triangle is doubled, then increase in the area of the triangle is _____.. (A) 100 2% . 5..   If  ( . (B) 131/300. (B) 358. (B) 4795 metres. (B) 200%. (C) 161/300. (C) 475. (C) 4800 metres. (C) 300%. (D) 216/300. (D) 583. (D) None of these. (D) 400%.   a  −2  2   1 −    a  b   = 1 and a + b = 5, then find a and b respectively. a − b )2 + 2 ab . (A) 3, 2. (B) 4, 1. 6.. If the animals which can walk are called 'swimmers', animals who crawl are called 'flying', those living in water are called 'snakes' and those which fly in the sky are called 'hunters', then what will a lizard be called ?. (A) Swimmers. 7.. For the set of numbers 2, 2, 4, 5 and 12, which of the following expressions is true ?. (A) Mean = Median. 8.. Namita walks 14 metres towards west, then turns to her right and walks 14 metres and then turns to her left and walks 10 metres. Again turning to her left she walks 14 metres. What is the shortest distance (in metres) between her starting point and the present position ?. (A) 10. 9.. How many numbers from 1 to 100 are there each of which is not only exactly divisible by 4 but also has 4 as a digit ?. (A) 7. (B) Snakes. (B) Mean > Mode. (B) 24. (B) 10. 10. Simplify by combining similar terms : 3 147 −. 189. (A). 3 3. 175 (B) 3 3. (C) 2, 3. (C) Flying. (C) Mean < Mode. (C) 28. (C) 20. (D) –1, 6. (D) Hunters. (D) Mode = Median. (D) 38. (D) 12. 7 1 1 +7 3 3 3 208 3 3 . (C). Copyright©2015. Science Olympiad Foundation (SOF). 203. (D). 3 3.

(21) 3. CLASS 10 | 14th NSO - 2011. 11. Which letter in the word CYBERNETICS occupies the same position as it does in the English alphabet ?. (A) C. (B) E. (C) I. (D) T. 12. If both a and b belong to the set {1, 2, 3, 4}, then the number of equations of the form ax2 + bx + 1 = 0 having real roots is ______.. (A) 10. (B) 7. 13.. Consider the (i) adjacent (iii) opposite Which of the. (A) (i) and (iii) . (C) 6. (D) 12. following statements : When two straight lines intersect, angles are complementary (ii) adjacent angles are supplementary angles are equal (iv) opposite angles are supplementary following statements must be true? (B) (ii) and (iii) . (C) (i) and (iv) . (D) (ii) and (iv). (C) 1. (D) 2. 14. If sinq + sin2q = 1, then cos2q + cos4q = _______ .. (A) 0. (B). 2. 15. The middle digit of a number between 100 and 1000 is zero and the sum of the other digits is 11. If the digits be reversed, the number so formed exceeds the original number by 495; find it.. (A) 304. (B) 308. (C) 403. (D) 803. science 16. The answer to which of the following options will distinguish between a magnetic material and a. non-magnetic material? (A) Is it a metal or a non metal? (B) Is it a conductor or an insulator? (C) Can it be given an electric charge? (D) Does it affect the direction in which a compass needle points?. 17. Figure shows a ray of light P striking a mirror AB. The mirror AB and the mirror CD make an angle of 120° with each other. The angle of reflection of ray P at CD is _____.. (A) 20° . (B) 30°. (C) 50° . (D) 70°. 18. A boy of mass 55 kg, runs up 40 stairs, each measuring a height of 0.15 m, in 5 s. Column II gives numerical values for quantities described in column I. Match both the columns and select the correct option from the codes given below. . Column I . Column II. Work done by all the forces Work done by conservative forces Work done by external forces Work done in uniform acceleration (a) - (ii), (b) - (i), (c) - (iii), (d) - (iv) (a) - (iii), (b) - (iv), (c) - (ii), (d) - (i). Change in potential energy Change in kinetic energy Change in mechanical energy Zero (a) - (i), (b) - (iii), (c) - (iv), (d) - (ii) (a) - (iv), (b) - (ii), (c) - (i), (d) - (iii). (a) (b) (c) (d) (A) (C). (i) (ii) (iii) (iv) (B) (D). 19. The equation, E = Dmc2 gives the amount of energy released as a result of nuclear fission. What. does Dm stand for? (A) The original mass of the nuclei (B) The final total mass of the nuclei (C) The increase in total mass of the nuclei (D) The difference in mass between the original nuclei and the product nuclei Copyright©2015. Science Olympiad Foundation (SOF).

(22) 4. CLASS 10 | 14th NSO - 2011. 20. A body is left free on a frictionless inclined plane as shown in the figure. It takes 4 seconds to reach the bottom of the plank. What time would it take to slide from point P to point Q?. (A) 1 s (C) 3 s . (B) 2 s (D) 4 s. 21.. The diagram shows a resistor connected to a cell of e.m.f. 2 V. How much heat energy is produced in the resistor in six seconds? (A) 2.5 J (B) 4.8 J (C) 10 J (D) 60 J. 22. Rectangular components of a force are applied to move a body. One of the components is 30 N.. What should be the other component to obtain a resultant force of 50 N? (A) 30 N (B) 40 N (C) 50 N (D) 90 N. 23. In the circuit shown here, at which point is the current least ?. (A) P . (B) Q. (C) R (D) S. 24. An optician while testing the eyes finds the vision of a patient to be 6/12. By this he means that. ______. (A) The (B) The (C) The (D) The. person can read the letters of 6 inches from a distance of 12 m. person can read the letters of 12 inches from 6 m. person can read the letters from 6 m which the normal eye can read from 12 m . focal length of eye lens has become half that of the normal eye.. 25. The diagram shows waves set up in a rope by a student. moving the free end up and down at a steady rate. What is the wavelength of the waves shown, and what will be the wavelength when the student doubles the frequency at which the free end is moved up and down?. . (A). (B). (C). (D). Wavelength as shown Wavelength when frequency doubled 0.50 m 1.00 m 0.50 m 0.50 m 1.00 m 1.00 m 1.00 m 0.50 m. 26. Refer the given statements and select the correct option.. Statement 1 : Aeroplanes always fly at low altitudes. Statement 2 : According to Newton's third law of motion, for every action there is an equal and opposite reaction. (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.. 27. Aqua-regia is ______. (A) HNO3 + HCl. (B) HNO3 + 3HCl. (C) 3HNO3 + HCl. (D) H2SO4 + 3HCl. 28. As compared to the pure metal, the electrical conductivity and melting point of an alloy is ____. (A) More (B) Less (C) Equal (D) Can't generalise Copyright©2015. Science Olympiad Foundation (SOF).

(23) 5. CLASS 10 | 14th NSO - 2011. 29. In the given figure, the red-brown gas evolved is _____. (A) Oxygen (B) Carbon dioxide (C) Nitrogen dioxide (D) Carbon monoxide 30. Acetic acid was added to a solid X taken in a test tube. A colourless and odourless gas was evolved. The gas was passed through lime water which did not turn milky. However the gas burnt with a pop (A) Solid X (C) Solid X (D) Solid X. sound. It was concluded that ______. (B) Solid X is sodium and the gas evolved is H2 is sodium and the gas evolved is CO2 is sodium acetate and the gas evolved is CO2 is sodium chloride and the gas evolved is H2. 31. Two non-metals X and Y combine with each other by sharing electrons to form compound Z. Which is the correct statement for compound Z? (A) Undergoes ionic reactions and soluble in organic solvents. (B) Undergoes ionic reactions and soluble in water. (C) Undergoes molecular reactions and soluble in organic solvents. (D) Undergoes molecular reactions and soluble in water. 32. A compound P is taken in a flat bottomed flask as shown in figure. Dilute hydrochloric acid is added drop by drop. A gas Q is evolved which is then passed in a test tube containing R. A solid precipitate S is formed. R is frequently used in white washing. During white washing a layer of R is applied on the wall and it reacts with gas Q (present in air) to produce white shiny layer of S on the wall. P, Q, R and S respectively are _____.. P Q R S SO2 Ca(OH)2 CaSO4 (A) Na2SO4 (B) Na2SO3 O2 Ca(OH)2 CaO (C) Na2CO3 O2 Ca(OH)2 CaCO3 (D) Na2CO3 CO2 Ca(OH)2 CaCO3 33. Given below are the melting points and the atomic radii of four elements P, Q, R and S each having n electrons in the outermost shell of their atoms. Which element will have the highest atomic number? Element Melting point (°C) °) Atomic radius (A (A) P. (B) Q. P. Q. R. S. 1.34. 1.54. 1.96. 2.05. 1.20. 1.31. 1.36. 1.42. (C) R. (D) S. 34. Monty fully filled a glass bottle with water, put a stopper on it and placed it upright in the freezer overnight. When he looked at it in the morning, the stopper was off the bottle and a column of. ice had emerged through the opening of the bottle. Which one of the following is the best explanation for what Monty had observed? (A) The bottle had contracted when it was put in the freezer and the water could no longer fit into it. (B) Extra water condensed from the air in the freezer and then froze to form the column of ice. (C) The bottle and stopper had contracted, allowing the water to pour out and form the ice column. (D) The volume of water increased when the water froze, forcing the stopper off the bottle and forming the column of ice. Copyright©2015. Science Olympiad Foundation (SOF).

(24) 6. CLASS 10 | 14th NSO - 2011. 35. When liquid carbon disulphide (CS2) is added to water taken in a tube, which is the correct. observation? (A) I . (B) II. (C) III. (D) IV. 36. Light is passed through the solution of X and solution of Y. The following figure shows the observation.. What could be X and Y ? (A) X = Milk Y (B) X = Mud Y (C) X = Milk Y (D) X = Copper sulphate Y. = = = =. Mud Milk Copper sulphate Milk. 37. How many moles of gold are present in an ornament containing 88.65 g of gold ? (Atomic mass of Au is 197 u) (A) 0.5 mol. (B) 0.45 mol. (C) 4.5 mol. (D) 5.0 mol. 38. Match the names of the scientists given in column-I with contributions towards the understanding of the atomic structure as given in column-II and choose the correct option from the codes given below. . Column-I . Dalton (i) Atomic number E. Goldstein (ii) Indivisibility of atoms Moseley (iii) Neutrons J.Chadwick (iv) Canal rays (P) - (ii), (Q) - (iv), (R) – (i), (S) - (iii) (B) (P) - (ii), (Q) - (i), (R) - (iv), (S) – (iii) (P) - (iv), (Q) - (ii), (R) - (i), (S) - (iii) (D) (P) - (iii), (Q) - (iv), (R) - (i), (S) - (ii). (P) (Q) (R) (S) (A) (C). Column-II. 39. The given figure represents a plant cell after being placed. in a strong sugar solution. The different parts have been labelled as a, b, c, d & e. Which of the following is the correct labelling ?. (A). (B). (C). (D). a Cell wall Cell membrane Cell wall Cell membrane. Sugar Sugar Sugar Sugar. b solution solution solution solution. c Protoplasm Protoplasm Vacuole Vacuole. d Vacuole Vacuole Protoplasm Protoplasm . e Cell membrane Cell wall Tonoplast Tonoplast. 40. Match Column I with Column II and select the correct option from the codes given below.. (a) (b) (c) (d) (e) (A) (C). Column I Suicide bag of the cell (i) Power house of the cell (ii) Protein factory of the cell (iii) Kitchen of the cell (iv) Circulatory system of the cell (v) a-(iii), b-(i), c-(ii), d-(iv), e-(v) a-(iii), b-(i), c-(iv), d-(v),e-(ii) . Column II Mitochondria Ribosome Lysosome Endoplasmic reticulum Chloroplast (B) a-(iii), b-(i), c-(ii), d-(v), e-(iv) (D) a-(i), b-(iii), c-(ii), d-(v),e-(iv). Copyright©2015. Science Olympiad Foundation (SOF).

(25) 7. CLASS 10 | 14th NSO - 2011. 41. A leafy shoot is placed in a beaker containing a solution of a coloured dye. The given figure shows part of a section of the shoot after two days. Which part is now most coloured by the dye ?. (A) a (C) c . (B) b (D) d. 42. The given diagram shows some stages in the carbon cycle. W, X , Y and Z are carbon compounds.. What is W ? (A) Carbon compounds in animals (B) Carbon compounds in plants (C) Carbon dioxide in the air (D) Coal and oil. 43. Which of the following organisms show mixotrophic nutrition?. (A). (B). (C). (D) Both (B) & (C). 44. Match Column I with Column II and select the correct option from the codes given below.. Column I Column II (a) Auxin (i) Fruit ripening (b) Cytokinins (ii) Phototropism (c) Gibberellins (iii) Stimulation of cell division (d) Abscisic acid (iv) Suppression of cell division (e) Ethylene (v) Stomatal opening and closing (vi) Growth of lateral buds (vii) Stem elongation in "rosette" plants (A) a-(iii), (vi), b-(vii), c-(ii), d-(i),(iv), e-(v) (B) a-(ii), b-(v), c-(iii),(vi), d-(vii), e- (i), (iv) (C) a-(iii), (vi), b-(ii), c-(vii), d-(v),e-(i),(iv) (D) a-(ii), b-(iii), (vi), c-(vii), d-(v),e-(i), (iv). 45. Sperms travel during an ejaculation from the. (i). , where they are stored to the. where they are transported to the ejaculatory duct and then to the. (iii). (ii). , from. , which carries both. reproductive and excretory fluids. A vasectomy is a surgical procedure for contraceptive purposes in which the _(iv) is cut and blocked so as to prevent sperms from being present in the semen. Select the correct sequence of terms to complete the above paragraph. (i) (ii) (iii) (iv) (A) Vas deferens Epididymis Urethra Vas deferens (B) Vas deferens Epididymis Urethra Seminiferous tubules (C) Epididymis Vas deferens Urethra Vas deferens (D) Epididymis Vas deferens Urethra Seminiferous tubules 46. Which of the following control measures would not help to prevent the spread of malaria? (A) Boiling drinking water (B) Covering windows with netting (C) Draining swamps (D) Spraying insecticides on stagnant water Copyright©2015. Science Olympiad Foundation (SOF).

(26) 8. CLASS 10 | 14th NSO - 2011. 47. Which of Mendel's laws states that when two homozygous individuals with one or more sets of contrasting characteristics are crossed, the characteristics which appear in F 1 hybrids are dominant and those which do not are recessive ? (A) Law of segregation (B) Law of dominance (C) Law of independent assortment (D) None of these 48. Rabi and Kharif crops are the major crops of India. Given below is a list of crops. Categorize them as Rabi and Kharif crops. Paddy, Wheat, Soyabean, Mustard, Maize, Cotton, Barley, Sugarcane. (A) Rabi crops. Kharif crops (B) Rabi crops Kharif crops (C) Rabi crops Kharif crops (D) Rabi crops Kharif crops 49. The (A) (B) (C) (D). : : : : : : : :. Paddy, Wheat, Cotton, Sugarcane Soyabean, Mustard, Maize, Barley Wheat, Mustard, Barley, Sugarcane Paddy, Soyabean, Maize, Cotton Wheat, Mustard, Barley Paddy, Soyabean, Maize, Cotton, Sugarcane Paddy, Soyabean, Maize, Cotton, Sugarcane Wheat, Mustard, Barley. correct sequence of taxonomic categories is ______. Division → Class → Family → Order → Genus → Species Phylum → Order → Class → Family → Genus → Species Class → Division → Order → Family → Genus → Species Division → Class → Order → Family → Genus → Species. 50. Refer the given statements and select the correct option.. Statement 1 : Hepatitis is a communicable disease.. Statement 2 : Hepatitis can pass from an infected person to a healthy person. (A) Both the statements 1 & 2 are true and statement 2 is the correct explanation of statement 1. (B) Both the statements 1 & 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 the statements 1 & 2 are false.. SPACE FOR ROUGH WORK. Copyright©2015. Science Olympiad Foundation (SOF).

(27) Class 10 15th. SET A Year 2012. Copyright©2015. Science Olympiad Foundation (SOF).

(28) 15th NSO - SET A. 2. meNtal ability 1.. 105 goats, 140 donkeys and 175 cows have to be taken across a river. There is. only one boat. which will have to make many trips in order to do so. The lazy boatman has his own conditions for transporting them. He insists that he will take the same number of animals in every trip and they have to be of same kind. He will naturally like to take the largest possible number each time.. The number of animals went in each trip is _________. (A) 75 (B) 35 (C) 154. (D) 63. 2. In the given diagram, the circle stands for College Professors, the triangle stands for Surgical Specialists, and Medical Specialists are represented by the rectangle. Surgical Specialists who are. also Medical Specialists but not College Professors are represented by _____. (A) B (B) C (C) X (D) Z. 3. The zeroes of the polynomial f(x) = x3 – 5x2 – 2x + 24, if it is given that the product of its two. zeroes is 12 are ______. (A) 3, 4, – 2 (B) – 3, – 4, – 2. 4.. Choose from the options which most closely resembles the water image of the given combination.. QUARREL. (A). 5.. In the given figure, if. (A) 16 cm. QUARREL EL (C) QUA RR . (D) 3, 4, 2. (D) Q. UA. L E. RR. (B) QU. ARREL. (C) 3, – 4, – 2. A. DE 2 = and AE = 10 cm, then AB is ____. BC 3. E D. 105°. (B) 12 cm. (C) 15 cm. (D) 18 cm. 6.. Values of p and q for which the given system of linear equations have infinite number of solutions. B. 75°. 65°. C. are ______.. (A) p =1, q = 5. 2x + 3y = 9 (p + q)x + (2p – q)y = 3(p + q + 1) 5 1 (C) p = 4, q = – 2 (B) p = 3 , q = 3 . (D) p = 4, q = – 1. 7. Anita, Armaan, Narayani, Harsha and Ashish went on some days out during half term. The only one who went out bowling was Harsha. No-one except Narayani and Ashish went to the park. Anita, Armaan and Narayani watched a film together at the cinema. Everyone except Harsha went swimming. The. only child who did not visit the play centre was Armaan. Who visited the most places? (A) Anita (B) Armaan (C) Ashish (D) Narayani. 8. Along a road lie an odd number of stones placed at intervals of 10 metres. These stones have to be assembled around the middle stone. A person can carry only one stone at a time. A man carried the job with one of the end stones by carrying them in succession. In carrying all the stones he. covered a distance of 3 km. Find the number of stones. (A) 26 (B) 23 (C) 25 Copyright©2015. Science Olympiad Foundation (SOF). (D) 20.

(29) 15th NSO - SET A. 9.. 3. In the adjoining figure, O is the centre of the circle. The radius OP bisects a rectangle ABCD, at right angle. If DM = NC = 2 cm. D. M. and AR = SB = 1 cm and KS = 4 cm and OP = 5 cm, then the. A. R. area of the rectangle ABCD is ______.. (A) 8 cm2 (C) 12 cm2 . L. P. K O. N. C. S. B. (B) 10 cm2 (D) None of these. 10. When a number is divided by 9235, we get the quotient 888 and the remainder 222, such a least. possible number is ______. (A) 8200902 (B) 8200920. (C) 8200680. (D) None of these. 11. In the following question, find out which of the options completes the figure matrix.. (A). . (B). (C). . (D). . ?. 12. In the given figure, AB = CD = 2BC = 2BP = 2CQ. In the middle, a circle with radius 1 cm is drawn.. In the rest of the figure all are the semicircular arcs. The perimeter of the whole figure is ____.. (A) 4p. (B) 8p Q O C A P B D (C) 10p (D) None of these. 13. If A be the area of a right triangle and b one of the sides containing the right angle, the length of. the altitude on the hypotenuse is _____. 2A 2 Ab. (B). (A) 2 2 b + 2A b 4 + 4 A2. (C). 2 Ab 2 b 3 + 4 A2. (D). 2 A2 b b 4 + 3 A2. 14. A conical vessel whose internal radius is 10 cm and height 72 cm is full of water. If this water is poured into a cylindrical vessel with internal radius 30 cm, the height of the water level rises in. it is ______. 2 (A) 2 cm 3. (B) 3. 2 cm 3. (C) 5. 1 1 15. If 2  x 2 + 2  − 9  x +  + 14 = 0 , then x = _____.   x x  1. (B) 1. (A) 2. 2 cm 3. (C) 2. (D) 1. 1 cm 3. (D) All of these. science 16. Wires A and B are identical except that each is made from a different material. The one end of wire A is connected to one end of wire B. The two remaining ends are connected across a battery and. current flows through the two wires. Which statement concerning this situation is true? (A) The potential difference across the two wires is the same, but the current through each wire is different. (B) The potential difference across the two wires is the same, and the current through each wire is same. (C) The potential difference across the two wires is the different, but the current through each wire is same. (D) Both the potential difference across the two wires and current through each wire is different.. Copyright©2015. Science Olympiad Foundation (SOF).

(30) 15th NSO - SET A. 4. 17. A mirror is broken into two parts and these parts are separated by a distance of 1 cm as shown in figure. The focal length of the mirror is 10 cm. Find the location of the images (in cm), formed by the two parts. 1 cm. of mirror. The object is midway between the two principal axes. (A) 1, 1 (B) 1, 2 (C) 2, 2 (D) 0.5, 1. 15 cm. 18. A particle is acted upon by a force of constant magnitude which is always perpendicular to the. velocity of the particle. The motion of the particle takes place in a plane. It follows that ______. (A) Its velocity is constant (B) Its acceleration is constant (C) Its kinetic energy is conserved (D) None of these. 19. Match Column-I with Column-II and mark the correct option from the codes given below. . Column-I . (a) gh at height h . (i). (b) gh at depth h . (ii). (c) gpoles . (iii). (d) g (A) (a) - (i), (b) - (ii), (c) - (iii), (d) - (iv) (C) (a) - (i), (b) - (iii), (c) - (iv), (d) - (ii). (iv) (B) (D). Column-II 2h   g 1 −   R  GM R2 h  g 1−   R maximum (a) - (ii), (b) - (iii), (c) - (iv), (d) - (i) (a) - (ii), (b) - (iv), (c) - (i), (d) - (iii). 20. A uniform magnetic field is directed into the page. A charged particle, moving in the plane of the page, follows a clockwise spiral of decreasing radius as. shown in the given figure. Which of the following statements is correct? (A) The charge is positive and slowing down. (B) The charge is negative and slowing down. (C) The charge is positive and speeding up. (D) The charge is negative and speeding up.. 21.. Which of the following statements is/are correct? (i) The distance between two consecutive compressions is called frequency of sound wave. (ii) Sound propagates as pressure variations. (iii) Compressions are narrower in a high pitched sound. (A) (i) only (B) (ii) only (C) (iii) only (D) (ii) and (iii). 22. Most of the sources of energy we use represent stored solar energy. Which of the following is not. ultimately derived from the sun's energy? (A) Geothermal energy (B) Wind energy. (C) Fossil fuels. (D) Biomass. 23. The number of alphabetical capital letters such as A, B, C, D, which are not laterally inverted by. a plane mirror is ______. (A) 6 (B) 7. (C) 11. (D) 13. 24. Two metallic wires A and B are connected in series. Wire A has length l and radius r, while wire B has length 2l and radius 2r. If both the wires are of same material then find the ratio of the total. resistance of series combination to the resistance of the wire A. 3 6 3. (B). (C). (A) 4 2 2 Copyright©2015. Science Olympiad Foundation (SOF). (D). 6 5.

(31) 15th NSO - SET A. 25.. 5. Read the given statements and mark the correct option. Statement 1 : A body can have acceleration even if its velocity is zero at a given instant. Statement 2 : A body is momentarily at rest when it reverses its direction of velocity. (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.. 26. Consider a planet in some system which has a mass double the mass of the earth and density equal to the average density of the earth. If an object weighs W on the earth, then its weight on the planet is ____. W. (A) W (B) 2W (C). (D) 21/3 W 2 27. Ananya prepared 300 g of 35% solution of cane sugar. She heated the solution for half an hour and found that the solution now weighed 130 g. The amount of water evaporated during heating is _____.. (A) 25 g (B) 170 g (C) 195 g (D) 105 g 28.. Which of the following processes does not involve either oxidation or reduction? (A) Formation of slaked lime from quick lime (B) Heating mercuric oxide (C) Formation of manganese chloride from manganese oxide (D) Formation of zinc from zinc blende. 29. 12 g of X2O5, an oxide of element X contains 7.2 g of X. How many moles of X does 7.2 g of the. element contain? (A) 6. (B) 0.5. (C) 0.2. (D) 4.5. 30. A large volume of copper(II) sulphate solution is left in an iron container overnight. Identify the correct statement for above reaction.. (A) The solution evaporates completely and some copper(II) sulphate crystals are left behind.. (B) The part of the container in contact with the solution is coated with copper.. (C) Some fine iron particles are formed in the solution.. (D) Atmospheric oxygen reacts with the copper(II) sulphate to give black copper(II) oxide. 31. Naturally occurring argon (Ar) consists of three isotopes, the atoms of which occur in the abundances as given in the table. The atomic weight of argon is. (A) 38.45 u (B) 37.20 u. (C) 39.98 u (D) 40.98 u. Isotopes. Abundance. 36. Ar. 0.34%. 38. Ar. 0.07%. 40. Ar. 99.59%. 32. Ashish took 4 test tubes P, Q, R. and S, each containing 10 mL of different solutions as shown in figure.. Few drops of methyl orange are added to each tube. The solution in which tube will turn methyl orange to red?. (A) P (B) Q. (C) R. (D) S. 33. An ion M3+ contains 10 electrons and 14 neutrons. Element M has valency equal to the valency of an other element X which has five electrons less than Ar in its outermost shell. Identify the elements. M and X. (A) Element M is Al and X is N. (C) Element M is Ne and X is B.. (B) Element M is N and X is Al. (D) Both elements M and X are Al.. Copyright©2015. Science Olympiad Foundation (SOF).

(32) 15th NSO - SET A. 6. 34. Compound X has the molecular formula C2H6O.. 1. X can be made by fermentation process. 2. X can be oxidised to Y.. 3. X can react with Y to form Z and water. To which homologous series do X, Y and Z belong?. X Y Z. (A) Alcohols Carboxylic Acids Esters. (B) Alcohols Esters Carboxylic Acids. (C) Carboxylic Acids Alcohols Esters. (D) Carboxylic Acids Esters Alcohols 35. When sodium hydroxide is added to ferric chloride solution, a reddish brown precipitate is formed. The precipitate is separated from the mixture by the process of __________.. (A) Evaporation (B) Sublimation (C) Fractional distillation (D) Filtration 36. Study the given table carefully. Identify P, Q, R, T and U.. P Q R T. (A) Mg O Ne P. (B) O Mg Ar P. (C) Mg O Ar P. (D) O Mg Ne P. Groups → U Ar Ne Ne Ar. Periods ↓ 2 3. 1. 2 P. 3 to 12 13 14 15 16 17 18 S. T. Q. R U. Direction (Q. nos. 37 & 38) : The given graph represents the heating curve of a substance (solid) which is heated at a constant rate over a period of time. Observe the graph carefully and answer the question. 37. On the heating curve diagram, the section representing liquid only is. (A) PQ (C) RS. (B) QR (D) ST. 38. Identify the process that takes place during line segment ST of the heating curve.. (A) Melting (B) Sublimation (C) Evaporation (D) Vaporisation 39. Mature sieve tube elements are devoid of ______.. (A) Nucleus (B) Cytoplasm (C) Protein. (D) Mitochondria. 40. Match Column-I with Column-II and select the correct option from the codes given below.. Column-I. Column-II. (a) Thallophyta (i) Marsilea. (b) Bryophyta (ii) Pinus. (c) Pteridophyta (iii) Ulothrix. (d) Gymnospermae (iv) Ficus. (e) Angiospermae (v) Funaria. (A) (a)-(iii), (b)-(ii), (c)-(i), (d)-(iv), (e)-(v) (B) (a)-(i), (b)-(ii), (c)-(iii), (d)-(iv), (e)-(v). (C) (a)-(i), (b)-(v), (c)-(iii), (d)-(ii), (e)-(iv) (D) (a)-(iii), (b)-(v), (c)-(i), (d)-(ii), (e)-(iv) 41. Given below are statements about five types of fishes P, Q, R, S and T. . (i) P is surface feeder. (ii) Q feeds in the middle zone of the pond.. (iii) R and S are bottom feeders. (iv) T feeds on zooplanktons. Identify P, Q, R, S and T and select the correct option.. (A) P is catla and Q is grass carp. (B) R is mrigal and S is catla.. (C) Q is catla and T is mrigal. (D) Q is rohu and P is mrigal. . Copyright©2015. Science Olympiad Foundation (SOF).

(33) 15th NSO - SET A. 7. 42. Fill in the blanks and select the correct option.. (i) _____ disease continues for many days and causes long term effect on the body.. (ii) _____ disease continues for a few days and causes no long term effect on the body.. (iii) Antibiotics commonly block biochemical pathways important for the growth of _____.. (iv) Sleeping sickness is caused by _____ and kala-azar is caused by _____. (i) (ii) (iii) (iv). (A) Chronic Acute Bacteria Leishmania, Trypanosoma. (B) Acute Chronic Virus Leishmania, Trypanosoma. (C) Chronic Acute Bacteria Trypanosoma, Leishmania. (D) Acute Chronic Virus Trypanosoma, Leishmania 43. A farmer regularly sprayed insecticides on his crops throughout the cropping season. The insecticides get washed off into a nearby lake where they were absorbed by the producers of the given food chain.. Which of the following shows the correct levels of insecticides the cropping season? [Amount of insecticides is shown in ppm (A) (i) – 25.0, (ii) – 5.0, (iii) – 0.5, (iv) – 0.05 (B) (i) – 0.05, (C) (i) – 0.05, (ii) – 0.5, (iii) –5.0, (iv) – 25.0 (D) (i) – 25.0,. in these organisms at the end of (parts per million)] (ii) – 0.05, (iii) – 0.05, (iv) – 0.05 (ii) – 25.0, (iii) – 25.0, (iv) – 25.0. 44. Beena conducted an experiment in which two. potato tubers were peeled and a cavity was made in each of them. One of the potato tuber was boiled while the other one was not. The cavities in both tubers were filled with distilled water and they were then placed in petri-dishes containing 1M sucrose solution. The results are shown in the given figures.. Select the correct statement regarding this.. (A) Water level decreased in the cavity of boiled potato tuber due to evaporation. (B) Water level decreased in the cavity of unboiled potato tuber due to osmosis. (C) In the cavity of unboiled potato tuber no sucrose was found while in the cavity of boiled potato tuber sucrose was found. (D) All of the above.. 45. A student carried out an experiment to investigate the. conditions necessary for photosynthesis. He fixed leaf 'A' of a potted plant into a flask containing potassium hydroxide solution. He fixed another leaf 'B' of the plant into a flask containing water and wrapped the flask with a piece of black cloth. The plant was left in sunlight. After 6 hours he detached and tested both leaves for starch. Which of the following results most likely the student had found?. (A) Starch was found in both leaves A and B. (B) Starch was found in leaf A, but not in leaf B.. (C) Starch was found in leaf B, but not in leaf A. (D) Starch was not found in any leaves. 46.. Which of the following is incorrect for the given figure? (A) The part labelled as S is called protein factory of the cell. (B) The part labelled as Q is formed with the help of part labelled as P. (C) The part labelled as R helps in synthesis of enzymes. (D) The functions of parts labelled as Q and R are controlled by part labelled as P. Copyright©2015. Science Olympiad Foundation (SOF).

(34) 15th NSO - SET A. 8. 47. Correct the following statements by replacing the terms underlined (wherever necessary) and select the correct option.. (i) The part of human brain which regulates heart beat is called cerebrum.. (ii) Chemotropism is directional movement.. (iii) The centre for sexual behaviour is situated in medulla oblongata.. (iv) The plant hormone named after the fungus causing bakane disease is IAA.. (v) Centre for hunger and thirst is located in diencephalon. (i). (ii) (iii) (iv). (v). (A) Hypothalamus Tropic Cerebrum Auxin Diencephalon. (B) Medulla oblongata Directional Hypothalamus Gibberellin Diencephalon (C) Hypothalamus Tropic Cerebrum Auxin Metencephalon. (D) Medulla oblongata Directional Hypothalamus Gibberellin Metencephalon 48. Which labelled parts in the given figure produce and store sperms respectively?. (A) S and Q . (B) P and R . (C) S and R . (D) R and Q. 49. Given below are four statements (a – d) each with one or two blanks. Select the option which correctly fills up the blanks in any two of these statements. (i)__ evolution.. (a) Wings of butterfly and birds look alike and are the results of ___ (i)__ organ and an ___ (ii)__evidence of evolution.. (b) Vermiform appendix is a ___ (i). (c) Archaeopteryx shows ___ __ link between two different groups of organisms. (i)__ and ___ (ii)__ of the fittest.. (d) According to Darwin evolution took place due to ___. (A) (d) – (i) mutations, (ii) survival (B) (a) – (i) divergent (a) – (i) convergent (b) – (i) rudimentary, (ii) anatomical . (C) (b) – (i) vestigial, (ii) anatomical (D) (c) – (i) connecting (c) – (i) missing (d) – (i) small variations, (ii) multiplication 50. The given figure shows four food chains with human at the top. Which two of these chains supply maximum amount of energy to the human?. (A) P and Q . (B) P and S. (C) Q and R. (D) Q and S SPACE FOR ROUGH WORK. Copyright©2015. Science Olympiad Foundation (SOF).

(35) Class 10 15th. SET B Year 2012. Copyright©2015. Science Olympiad Foundation (SOF).

(36) 15th NSO - SET B. 1. meNtal ability 1. The given diagram shows a square inscribed in a circle with centre O. The radius of the circle is 6 cm. The perimeter of the shaded region can be written as. (pp + q) centimetres. Then the value of p and q respectively is _____. (A) 12, 3 (B) 3, 12 (C) 3, 2. (D) 2, 3. 2. Mohit, Raj, Kartik, Varun and Rajat spend some of their pocket money as given below. I. Mohit spends ` 100 more than Raj. II. Varun spends ` 50 less than Kartik. III. Rajat spends twice as much as Mohit. IV. Kartik spends ` 400.. V. Raj and Varun spends the same amount. If these statements are true, only one of the sentences below must be true. Identify it.. (A) Raj spends more than Rajat. (B) Mohit spends less than Kartik.. (C) Varun spends ` 350. (D) Rajat spends the least. 3. The function f(x) = x3 – 6x2 + ax + b, where a and b are constants, is exactly divisible by (x – 3) and leaves a remainder of –55 when divided by (x + 2). The value of a and b is _____.. (A) a = –10, b = 3 (B) a = 10, b = 3 (C) a = 10, b = –3 (D) a = –10, b = –3 A. 4. In the given diagram, AB is parallel to DC. AC and BD intersect at X. If AB = 8 cm, AX = 4 cm, XC = 6 cm and BD = 14 cm. Find BX.. (A) 4.5 cm (B) 5.6 cm. (C) 8.5 cm (D) 12 cm. B. X D C. 5. If secq + tanq = p, then sinq = ______. p2. p2 − 1. p2 − 1. p2 + 1. p2 + 1. p2 − 1. (A). 6.. Find the mode of the following distribution of marks obtained by 80 students.. (B). (C). (D). Marks obtained. 0-10. 10-20. 20-30. 30-40. 40-50. Number of students. 6. 10. 12. 32. 20. (B) 34.82. (C) 36.25. p p +1 2. (A) 28.42. (D) 34.86. 7.. How many 9's in the following sequence of the numbers are immediately preceded by 8 but not immediately followed by 4? 9 8 6 2 7 9 6 2 8 9 4 8 8 9 4 9 8 4 8 8 9 4 9 8 4 9 (A) 1 (B) 2 (C) 3 (D) None of these. 8.. Shikha and Riya are friends and their ages differ by 2 years. Shikha's father Rajiv is twice as old as Shikha and Riya is twice as old as her sister Maya. The age of Rajiv and Maya differ by. 40 years. Then the age of Shikha and Riya respectively are ____. 1 1 (A) 26 years, 24 years (B) 27 years, 29 years (C) 27 years, 29 years 3 3. (D) Both (A) and (B). 9. The number which will replace the question mark in the number pattern given below is _____.. (A) 262. (B) 622. (C) 631. Copyright©2015. Science Olympiad Foundation (SOF). (D) 643.

(37) 15th NSO - SET B. 10. If cot q =. (A). 2. 3 , then the value of 4. sec θ − cosecθ is _____. sec θ + cosecθ 1 (B) –1 (C). 3. 1. 7. (D) 2. 11. The triangle with vertices A(4, 4), B(–2, –6) and C(4, –1) is shown. in the diagram. The area of DABC is ______.. (A) 5 sq. units. (B) 12 sq. units. (C) 15 sq. units. (D) 20 sq. units. 10. y. 8 6. A. 4 2 –4 –2 0 –2. 2. 4. C. 6. 8 10. x. –4. B. –6. 12. Which of the following options replaces the (?) in the adjoining figure matrix?. (A). . (B). (C). . (D). 13. In a school there are two sections of class X - section A and section B. There are 32 students in section A and 36 students in section B. Determine the minimum number of books required for their. class library so that they can be distributed equally among students of section A or section B. (A) 258 (B) 268 (C) 288 (D) 298. 14. The The. (A). (B). (C). (D). graph of a polynomial f(x) is as shown in the figure. number of real zeroes of f(x) is_______. 1 2. 3 4. 15. If sinq + sin2q = 1, then the value of cos12q + 3cos10q + 3cos8q + cos6q + 2cos4q + 2cos2q – 2 is _____. 1. (A) –1 (B) 1 (C) 0 (D) 2. science 16. A current of 0.5 A passes through a conductor in 2 seconds. How many electrons flow through this conductor from one end to the other end during this interval of time ? (Charge on each electron is 1.6 × 10–19 C). (A) 6.25 × 1018 electrons (B) 3.15 × 10 19 electrons (C) 1.53 × 1019 electrons (D) 1 × 1018 electrons 17. Two plane mirrors are placed parallel to each other at a distance L apart. A point object O is placed L from one mirror. Both mirrors form multiple images. The distance 3 between any two images cannot be ________. 2L 3L. (B). (C) 2L (D) None of these (A) 3 2 between them, at a distance. 18.. A constant current of 3.0 A flows counter clockwise in the circular coil P as shown in figure. What is the direction of the induced current in the coil Q on the right? (A) Clockwise (B) Counter clockwise (C) Out of the page (D) There is no induced current. P Q Copyright©2015. Science Olympiad Foundation (SOF).

(38) 15th NSO - SET B. 3. 19. Read the given statements and select the correct option.. Statement 1 : Acceleration due to gravity at a place on earth remains constant for all objects.. Statement 2 : Acceleration due to gravity doesn't depend on the mass of the object, but only on mass of earth.. (A) Both statement 1 and statement 2 are true and statement 2 is the correct explanation of statement 1.. (B) Both statement 1 and statement 2 are true but statement 2 is not the correct explanation of statement 1.. (C) Statement 1 is true but statement 2 is false. (D) Statement 1 is false but statement 2 is true. 20. The potential difference between the ends of a conductor is 12 V. How much electrical energy is converted to other forms of energy in the conductor when 100 C of charge flows through it?. (A) 0.12 J (B) 8.3 J (C) 88 J (D) 1200 J 21. A hollow copper tube of 5 m length has got external diameter equal to 10 cm and its walls are 5 mm thick. The specific resistance of copper is 1.7 × 10–8 W m. The resistance of the copper tube is approximately _______. (B) 5.6 × 10–9 W (C) 5.6 × 10–5 W (D) 5.6 × 10–7 W. (A) 5.6 × 10–3 W 22. A Juggler throws two balls to the same height so that one is at the halfway point going up when the other is at the halfway point coming down. At that point _______.. (A) Their velocities and accelerations are equal. (B) Their velocities are equal but their accelerations are equal and opposite. (C) Their accelerations are equal but their velocities are equal and opposite. (D) Their velocities and accelerations are both equal and opposite 23. Identical bulbs are connected in the circuit as shown in the figure.. Statement 1 : Bulb C glows brighter than bulb A.. Statement 2 : The current through bulb C is more than the current through bulb A.. (A) Both statement 1 and statement 2 are true and statement 2 is the correct explanation of statement 1.. (B) Both statement 1 and statement 2 are true but statement 2 is not the correct explanation of statement 1.. (C) Statement 1 is true but statement 2 is false. (D) Statement 1 is false but statement 2 is true. 24. The. (A). (C). (D). body will speed up if _______. Velocity and acceleration are in same direction (B) Velocity and acceleration are in opposite direction Velocity and acceleration are in perpendicular direction None of these. 25. A metal cube is placed in an empty vessel. When water is filled in the vessel so that the cube is completely immersed in the water, the force on the bottom of the vessel in contact with the cube will _____.. (A) Increase (B) Decrease (C) Remain the same (D) Become zero 1. 26. Which pairs of rays from the object in the drawing are used to 2 3. construct the image location produced by the convex spherical mirror of focal length f and radius R? R f. (A) 1 and 3 (B) 1 and 2. (C) 2 and 3 (D) Any pair of rays shown will work. f. R. 27. Diagrams W, X and Y show how the particles of a substance are packed at different temperatures.. . W. X. Y. The given graph shows the temperature changes which occur on warming the substance. In which region of the graph would all the particles be packed as in Y?. (A) I (B) II (C) III (D) IV Copyright©2015. Science Olympiad Foundation (SOF).

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