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Page 1 NTSE SAT ANSWER 2015 1. 2 2. 1 3. 4 4. 3 5. 2 6. 1 7. 3 8. 4 9. No Solution 10. 1 11. 3 12. 2 13. 2 14. 2 15. 2 16. 2 17. 4 18. 1 19. 1 20. 3 21. 2 22. 3 23. 1 24. 2 25. 2 26. 2 27. 1 28. 2 29. 1 30. 2 31. 3 32. 2 33. 1 34. 4 35. 3 36. 3 37. 1 38. 2 39. 1 40. 2 81. 1 82. 2 83. 2 84. 4 85. 2 86. 3 87. 4 88. 2 89. 4 90. 1 91. 1 92. wrong que. 93. 2 94. 3 95. 2 96. 3 97. 1 98. 2 99. 1 100. 3 PHYSICS SOLUTIONS 1. (2) Solution: Phase 2. (1) Solution. Zero, avg of random velocity (motion) is zero here 3. 4 Solution. Alternating current. 4. 3 Solution. Rayleigh scattering has dependence on size of particle as well as wavelength of light. 5. 2 Solution. Let speed in air = V In the medium = 0.6 V ?refractive index of medium w.r.t. air 15 0.6 3 1.67 = = = 6. 1 Solution. Thicknening of eye lens ? move stressed eye Focal length decreases ? cilliary muscle contract I – B – i 7. 3 Solution. Hydrogen ion ? proton net flow is 3 x 1 x 10 18 electrons travelling left 18 19 1 ne 3 1 10 1.6 10 current 4.8 10 A 0.48 t1 - - ×× × × ? = = = ×= 8. 4 Solution. Tangent of field line gives local direction. 9. No Solution Solution. Tap key to keep circuit open I – C – iv Ammeter to be connected in series II – A – i Voltmeter to be connected in parallel. III – d – ii Galvenometer detects presence of current IV – b – iii Page 2 NTSE SAT ANSWER 2015 1. 2 2. 1 3. 4 4. 3 5. 2 6. 1 7. 3 8. 4 9. No Solution 10. 1 11. 3 12. 2 13. 2 14. 2 15. 2 16. 2 17. 4 18. 1 19. 1 20. 3 21. 2 22. 3 23. 1 24. 2 25. 2 26. 2 27. 1 28. 2 29. 1 30. 2 31. 3 32. 2 33. 1 34. 4 35. 3 36. 3 37. 1 38. 2 39. 1 40. 2 81. 1 82. 2 83. 2 84. 4 85. 2 86. 3 87. 4 88. 2 89. 4 90. 1 91. 1 92. wrong que. 93. 2 94. 3 95. 2 96. 3 97. 1 98. 2 99. 1 100. 3 PHYSICS SOLUTIONS 1. (2) Solution: Phase 2. (1) Solution. Zero, avg of random velocity (motion) is zero here 3. 4 Solution. Alternating current. 4. 3 Solution. Rayleigh scattering has dependence on size of particle as well as wavelength of light. 5. 2 Solution. Let speed in air = V In the medium = 0.6 V ?refractive index of medium w.r.t. air 15 0.6 3 1.67 = = = 6. 1 Solution. Thicknening of eye lens ? move stressed eye Focal length decreases ? cilliary muscle contract I – B – i 7. 3 Solution. Hydrogen ion ? proton net flow is 3 x 1 x 10 18 electrons travelling left 18 19 1 ne 3 1 10 1.6 10 current 4.8 10 A 0.48 t1 - - ×× × × ? = = = ×= 8. 4 Solution. Tangent of field line gives local direction. 9. No Solution Solution. Tap key to keep circuit open I – C – iv Ammeter to be connected in series II – A – i Voltmeter to be connected in parallel. III – d – ii Galvenometer detects presence of current IV – b – iii No choice is correct In option 4 ? ii & i is replaced, to be it correct. 10. 1 Solution. Virtual image can be produced by other optical insinemt. 11. 3. 12. 2. Chemistry Solution 14. NO of elements is 1 st period -2 H-He (1 – 2) 2 nd period -8 Li-Ne (3-10) 3 rd period -8 Na-Ar (11-18) 4 th period -18 K-Kr (19-36) Answer – 2 15. Antacids are used for indigestion Ex - ( ) 2 Mg OH Answer – 2 16. Mercury ore is cinnabar (Hg5) Bauxite - 23 2 Al O .2H O Haematite - 23 Fe O Cinnabar – Hg5 Dolomite - 33 MgCO .CaCO Answer – 2 17. 32 KNO H O + 32 K NO H O +- ??? + + Temperature of solution falls endothermic reaction Answer - 2 18. Ammonium chloride is salt of weak base and strong acid 4 42 NH OH HCl NH Cl H O + ??? + Answer – 4 19. 3 2 3 CH CH CH CH CH 1 23 4 5 -=- - 2-pentene or pent – 2-ene Answer – 1 20. Oxygen electron dot structure O . . . . . O . . . . . . . Oxygen – 8 - 22 4 1s 2s 2p ( 0 6e s in valence shall) Answer – 1 21. Eka – Aluminium can form an oxide like Aluminium i e ( ) 23 23 Ga O like Al O Answer - 3 22. Pure copper acts as cathode and impure copper acts as anode Page 3 NTSE SAT ANSWER 2015 1. 2 2. 1 3. 4 4. 3 5. 2 6. 1 7. 3 8. 4 9. No Solution 10. 1 11. 3 12. 2 13. 2 14. 2 15. 2 16. 2 17. 4 18. 1 19. 1 20. 3 21. 2 22. 3 23. 1 24. 2 25. 2 26. 2 27. 1 28. 2 29. 1 30. 2 31. 3 32. 2 33. 1 34. 4 35. 3 36. 3 37. 1 38. 2 39. 1 40. 2 81. 1 82. 2 83. 2 84. 4 85. 2 86. 3 87. 4 88. 2 89. 4 90. 1 91. 1 92. wrong que. 93. 2 94. 3 95. 2 96. 3 97. 1 98. 2 99. 1 100. 3 PHYSICS SOLUTIONS 1. (2) Solution: Phase 2. (1) Solution. Zero, avg of random velocity (motion) is zero here 3. 4 Solution. Alternating current. 4. 3 Solution. Rayleigh scattering has dependence on size of particle as well as wavelength of light. 5. 2 Solution. Let speed in air = V In the medium = 0.6 V ?refractive index of medium w.r.t. air 15 0.6 3 1.67 = = = 6. 1 Solution. Thicknening of eye lens ? move stressed eye Focal length decreases ? cilliary muscle contract I – B – i 7. 3 Solution. Hydrogen ion ? proton net flow is 3 x 1 x 10 18 electrons travelling left 18 19 1 ne 3 1 10 1.6 10 current 4.8 10 A 0.48 t1 - - ×× × × ? = = = ×= 8. 4 Solution. Tangent of field line gives local direction. 9. No Solution Solution. Tap key to keep circuit open I – C – iv Ammeter to be connected in series II – A – i Voltmeter to be connected in parallel. III – d – ii Galvenometer detects presence of current IV – b – iii No choice is correct In option 4 ? ii & i is replaced, to be it correct. 10. 1 Solution. Virtual image can be produced by other optical insinemt. 11. 3. 12. 2. Chemistry Solution 14. NO of elements is 1 st period -2 H-He (1 – 2) 2 nd period -8 Li-Ne (3-10) 3 rd period -8 Na-Ar (11-18) 4 th period -18 K-Kr (19-36) Answer – 2 15. Antacids are used for indigestion Ex - ( ) 2 Mg OH Answer – 2 16. Mercury ore is cinnabar (Hg5) Bauxite - 23 2 Al O .2H O Haematite - 23 Fe O Cinnabar – Hg5 Dolomite - 33 MgCO .CaCO Answer – 2 17. 32 KNO H O + 32 K NO H O +- ??? + + Temperature of solution falls endothermic reaction Answer - 2 18. Ammonium chloride is salt of weak base and strong acid 4 42 NH OH HCl NH Cl H O + ??? + Answer – 4 19. 3 2 3 CH CH CH CH CH 1 23 4 5 -=- - 2-pentene or pent – 2-ene Answer – 1 20. Oxygen electron dot structure O . . . . . O . . . . . . . Oxygen – 8 - 22 4 1s 2s 2p ( 0 6e s in valence shall) Answer – 1 21. Eka – Aluminium can form an oxide like Aluminium i e ( ) 23 23 Ga O like Al O Answer - 3 22. Pure copper acts as cathode and impure copper acts as anode Answer - 2 23. (1) 2 2 CuO H H O Cu + ??? + (single displacement) (2) 44 Zn CuSO ZnSO Cu + ??? + (single displacement) (3) 33 AgNO NaCl AgCl NaNO + ??? + (Double displacement) (4) 22 Zn 2HCl 2nCl H + ??? + (Single displacement) Answer – 3 24. 2 HO 2: 16 = 1:8 Answer – 1 25. In Black and white photography AgBr is involved. 2 AgBr Sunlight 2 2Ag Br ? ??? ? + Answer - 2 26. (1) ( ) 24 4 2 Mg H SO MgSO H Occurs + ??? + (2) ( ) 22 Cu 2HCl CuCl H Do not + ??? + (3) ( ) 32 2Al 6HCl 2AlCl 3H Occurs + ??? + (4) 22 Fe 2HCl FeCl H + ??? + (Occurs) This is based on metal activity series Answer – 2 Biology : 27. (1) Mushroom Explanation: Mushroom exhibits saprophytic mode of nutrition while others (ticks, tape worms, Cuscuta exhibit parasitic mode of nutrition. 28. (2) Right atrium Explanation: Right atrium receives deoxygenated blood Left atrium receives oxygenated blood from the lungs Right ventricle pumps blood to the lungs Left ventricle pumps blood into aorta which supplies blood to the various regions of the body 29. (1) Drosera 30. (2) Hydra Explanation Nerve net is primitive stage of development od nervous system 31. (3) Bryophyllum Page 4 NTSE SAT ANSWER 2015 1. 2 2. 1 3. 4 4. 3 5. 2 6. 1 7. 3 8. 4 9. No Solution 10. 1 11. 3 12. 2 13. 2 14. 2 15. 2 16. 2 17. 4 18. 1 19. 1 20. 3 21. 2 22. 3 23. 1 24. 2 25. 2 26. 2 27. 1 28. 2 29. 1 30. 2 31. 3 32. 2 33. 1 34. 4 35. 3 36. 3 37. 1 38. 2 39. 1 40. 2 81. 1 82. 2 83. 2 84. 4 85. 2 86. 3 87. 4 88. 2 89. 4 90. 1 91. 1 92. wrong que. 93. 2 94. 3 95. 2 96. 3 97. 1 98. 2 99. 1 100. 3 PHYSICS SOLUTIONS 1. (2) Solution: Phase 2. (1) Solution. Zero, avg of random velocity (motion) is zero here 3. 4 Solution. Alternating current. 4. 3 Solution. Rayleigh scattering has dependence on size of particle as well as wavelength of light. 5. 2 Solution. Let speed in air = V In the medium = 0.6 V ?refractive index of medium w.r.t. air 15 0.6 3 1.67 = = = 6. 1 Solution. Thicknening of eye lens ? move stressed eye Focal length decreases ? cilliary muscle contract I – B – i 7. 3 Solution. Hydrogen ion ? proton net flow is 3 x 1 x 10 18 electrons travelling left 18 19 1 ne 3 1 10 1.6 10 current 4.8 10 A 0.48 t1 - - ×× × × ? = = = ×= 8. 4 Solution. Tangent of field line gives local direction. 9. No Solution Solution. Tap key to keep circuit open I – C – iv Ammeter to be connected in series II – A – i Voltmeter to be connected in parallel. III – d – ii Galvenometer detects presence of current IV – b – iii No choice is correct In option 4 ? ii & i is replaced, to be it correct. 10. 1 Solution. Virtual image can be produced by other optical insinemt. 11. 3. 12. 2. Chemistry Solution 14. NO of elements is 1 st period -2 H-He (1 – 2) 2 nd period -8 Li-Ne (3-10) 3 rd period -8 Na-Ar (11-18) 4 th period -18 K-Kr (19-36) Answer – 2 15. Antacids are used for indigestion Ex - ( ) 2 Mg OH Answer – 2 16. Mercury ore is cinnabar (Hg5) Bauxite - 23 2 Al O .2H O Haematite - 23 Fe O Cinnabar – Hg5 Dolomite - 33 MgCO .CaCO Answer – 2 17. 32 KNO H O + 32 K NO H O +- ??? + + Temperature of solution falls endothermic reaction Answer - 2 18. Ammonium chloride is salt of weak base and strong acid 4 42 NH OH HCl NH Cl H O + ??? + Answer – 4 19. 3 2 3 CH CH CH CH CH 1 23 4 5 -=- - 2-pentene or pent – 2-ene Answer – 1 20. Oxygen electron dot structure O . . . . . O . . . . . . . Oxygen – 8 - 22 4 1s 2s 2p ( 0 6e s in valence shall) Answer – 1 21. Eka – Aluminium can form an oxide like Aluminium i e ( ) 23 23 Ga O like Al O Answer - 3 22. Pure copper acts as cathode and impure copper acts as anode Answer - 2 23. (1) 2 2 CuO H H O Cu + ??? + (single displacement) (2) 44 Zn CuSO ZnSO Cu + ??? + (single displacement) (3) 33 AgNO NaCl AgCl NaNO + ??? + (Double displacement) (4) 22 Zn 2HCl 2nCl H + ??? + (Single displacement) Answer – 3 24. 2 HO 2: 16 = 1:8 Answer – 1 25. In Black and white photography AgBr is involved. 2 AgBr Sunlight 2 2Ag Br ? ??? ? + Answer - 2 26. (1) ( ) 24 4 2 Mg H SO MgSO H Occurs + ??? + (2) ( ) 22 Cu 2HCl CuCl H Do not + ??? + (3) ( ) 32 2Al 6HCl 2AlCl 3H Occurs + ??? + (4) 22 Fe 2HCl FeCl H + ??? + (Occurs) This is based on metal activity series Answer – 2 Biology : 27. (1) Mushroom Explanation: Mushroom exhibits saprophytic mode of nutrition while others (ticks, tape worms, Cuscuta exhibit parasitic mode of nutrition. 28. (2) Right atrium Explanation: Right atrium receives deoxygenated blood Left atrium receives oxygenated blood from the lungs Right ventricle pumps blood to the lungs Left ventricle pumps blood into aorta which supplies blood to the various regions of the body 29. (1) Drosera 30. (2) Hydra Explanation Nerve net is primitive stage of development od nervous system 31. (3) Bryophyllum 32. (2) two male gametes Explanation : The pollen tube contains 2 male gametes and one tube nucleus which generates the pollen tube 33. (1) Four Explanation: Considering a cross TtYy x TtYy , the groups of phenotypic characters are (TY, ty, Ty, tY ) 34. (4) Fish Amphibians Reptiles Birds Mammals According to origin, identify the secondary air pollutants 35. (3) Smoke 36. (3) 45 37. (1) cuboidal epithelium 38. ( 2) species 39. (1) estrogen 40. (2) bile juice ( pancreas – pancreatic juice, stomach- gastric juice, bile juice – liver and intestine – various digestive juice) MATHEMATICS Solution 81. (1) Hint. { } { } 1 3 5 .....to365 terms 365 2 (364 2 2 365 2 728 2 365 730 2 365 365 133225 +++ = + × = + = × = × = 82. (2) Let x price of one apple y price of one guava ATQ 19x 11y 482 0 11x 19y 418 0 by cross multiplicate x y1 4598 9158 5302 7942 361 121 4560 2640 x 19 & y 11 240 270 Hence x y 8. = = +- = +- = = = - + -+ - ?= = = = -= 83. (2) Page 5 NTSE SAT ANSWER 2015 1. 2 2. 1 3. 4 4. 3 5. 2 6. 1 7. 3 8. 4 9. No Solution 10. 1 11. 3 12. 2 13. 2 14. 2 15. 2 16. 2 17. 4 18. 1 19. 1 20. 3 21. 2 22. 3 23. 1 24. 2 25. 2 26. 2 27. 1 28. 2 29. 1 30. 2 31. 3 32. 2 33. 1 34. 4 35. 3 36. 3 37. 1 38. 2 39. 1 40. 2 81. 1 82. 2 83. 2 84. 4 85. 2 86. 3 87. 4 88. 2 89. 4 90. 1 91. 1 92. wrong que. 93. 2 94. 3 95. 2 96. 3 97. 1 98. 2 99. 1 100. 3 PHYSICS SOLUTIONS 1. (2) Solution: Phase 2. (1) Solution. Zero, avg of random velocity (motion) is zero here 3. 4 Solution. Alternating current. 4. 3 Solution. Rayleigh scattering has dependence on size of particle as well as wavelength of light. 5. 2 Solution. Let speed in air = V In the medium = 0.6 V ?refractive index of medium w.r.t. air 15 0.6 3 1.67 = = = 6. 1 Solution. Thicknening of eye lens ? move stressed eye Focal length decreases ? cilliary muscle contract I – B – i 7. 3 Solution. Hydrogen ion ? proton net flow is 3 x 1 x 10 18 electrons travelling left 18 19 1 ne 3 1 10 1.6 10 current 4.8 10 A 0.48 t1 - - ×× × × ? = = = ×= 8. 4 Solution. Tangent of field line gives local direction. 9. No Solution Solution. Tap key to keep circuit open I – C – iv Ammeter to be connected in series II – A – i Voltmeter to be connected in parallel. III – d – ii Galvenometer detects presence of current IV – b – iii No choice is correct In option 4 ? ii & i is replaced, to be it correct. 10. 1 Solution. Virtual image can be produced by other optical insinemt. 11. 3. 12. 2. Chemistry Solution 14. NO of elements is 1 st period -2 H-He (1 – 2) 2 nd period -8 Li-Ne (3-10) 3 rd period -8 Na-Ar (11-18) 4 th period -18 K-Kr (19-36) Answer – 2 15. Antacids are used for indigestion Ex - ( ) 2 Mg OH Answer – 2 16. Mercury ore is cinnabar (Hg5) Bauxite - 23 2 Al O .2H O Haematite - 23 Fe O Cinnabar – Hg5 Dolomite - 33 MgCO .CaCO Answer – 2 17. 32 KNO H O + 32 K NO H O +- ??? + + Temperature of solution falls endothermic reaction Answer - 2 18. Ammonium chloride is salt of weak base and strong acid 4 42 NH OH HCl NH Cl H O + ??? + Answer – 4 19. 3 2 3 CH CH CH CH CH 1 23 4 5 -=- - 2-pentene or pent – 2-ene Answer – 1 20. Oxygen electron dot structure O . . . . . O . . . . . . . Oxygen – 8 - 22 4 1s 2s 2p ( 0 6e s in valence shall) Answer – 1 21. Eka – Aluminium can form an oxide like Aluminium i e ( ) 23 23 Ga O like Al O Answer - 3 22. Pure copper acts as cathode and impure copper acts as anode Answer - 2 23. (1) 2 2 CuO H H O Cu + ??? + (single displacement) (2) 44 Zn CuSO ZnSO Cu + ??? + (single displacement) (3) 33 AgNO NaCl AgCl NaNO + ??? + (Double displacement) (4) 22 Zn 2HCl 2nCl H + ??? + (Single displacement) Answer – 3 24. 2 HO 2: 16 = 1:8 Answer – 1 25. In Black and white photography AgBr is involved. 2 AgBr Sunlight 2 2Ag Br ? ??? ? + Answer - 2 26. (1) ( ) 24 4 2 Mg H SO MgSO H Occurs + ??? + (2) ( ) 22 Cu 2HCl CuCl H Do not + ??? + (3) ( ) 32 2Al 6HCl 2AlCl 3H Occurs + ??? + (4) 22 Fe 2HCl FeCl H + ??? + (Occurs) This is based on metal activity series Answer – 2 Biology : 27. (1) Mushroom Explanation: Mushroom exhibits saprophytic mode of nutrition while others (ticks, tape worms, Cuscuta exhibit parasitic mode of nutrition. 28. (2) Right atrium Explanation: Right atrium receives deoxygenated blood Left atrium receives oxygenated blood from the lungs Right ventricle pumps blood to the lungs Left ventricle pumps blood into aorta which supplies blood to the various regions of the body 29. (1) Drosera 30. (2) Hydra Explanation Nerve net is primitive stage of development od nervous system 31. (3) Bryophyllum 32. (2) two male gametes Explanation : The pollen tube contains 2 male gametes and one tube nucleus which generates the pollen tube 33. (1) Four Explanation: Considering a cross TtYy x TtYy , the groups of phenotypic characters are (TY, ty, Ty, tY ) 34. (4) Fish Amphibians Reptiles Birds Mammals According to origin, identify the secondary air pollutants 35. (3) Smoke 36. (3) 45 37. (1) cuboidal epithelium 38. ( 2) species 39. (1) estrogen 40. (2) bile juice ( pancreas – pancreatic juice, stomach- gastric juice, bile juice – liver and intestine – various digestive juice) MATHEMATICS Solution 81. (1) Hint. { } { } 1 3 5 .....to365 terms 365 2 (364 2 2 365 2 728 2 365 730 2 365 365 133225 +++ = + × = + = × = × = 82. (2) Let x price of one apple y price of one guava ATQ 19x 11y 482 0 11x 19y 418 0 by cross multiplicate x y1 4598 9158 5302 7942 361 121 4560 2640 x 19 & y 11 240 270 Hence x y 8. = = +- = +- = = = - + -+ - ?= = = = -= 83. (2) Given one root is 25 + ? other root is 25 - Hence, requires equation { } 2 2 x (2 5) (2 5) x (2 5)(2 5) 0 x 4x 1 0 - + +- ++ - = ? - -= 84. (4) From formulae, x 15 x 97.5 94.5 h 2(x 15) x (x 5) 15 3h 3h 25 5 h5 upper limit 94.5 5 99.5 +- ?? = + ?? + - - + ?? ?? ?= = ?? ?? ?= ? = + = 85. (2) By expanding the determinants, we get 49 18 30 4b 4(a b) 48 a b 12 ans.2 -= - ? += ?+= 86. (3) Given 22 22 a6 9,b6 5 2(a b ) 2.2(6 5) 4 11 44 5ab 5 (1) 5 2(a b ) 5ab 44 5 39. = += - ? + = + = ×= = ·= ? + - = -= 87. (4) Let the total no. of swan = x ATQ. 2 7 X2 X 2 7x x2 2 2x 4 7 x 4x 65x 16 0 x 16 + = ? -= ? - = ? - + = ?= 88. (2)Read More
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