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Page 1 NTSE-2017-18 (Stage-I) ANSWER KEYS SAT 1. (4) 2. (3) 3. (4) 4. (2) 5. (2) 6. (1) 7. (3) 8. (4) 9. (1) 10. (2) 11. (1) 12. (4) 13. (4) 14. (3) 15. (3) 16. (2) 17. (4) 18. (2) 19. (4) 20. (2) 21. (2) 22. (1) 23. (3) 24. (1) 25. (1) 26. (1) 27. (3) 28. (3) 29. (3) 30. (2) 31. (3) 32. (1) 33. (3) 34. (3) 35. (2) 36. (4) 37. (1) 38. (4) 39. (1) 40. (3) 41. (3) 42. (2) 43. (4) 44. (3) 45. (3) 46. (3) 47. (2) 48. (2) 49. (4) 50. (3) 51. (2) 52. (2) 53. (1) 54. (3) 55. (2) 56. (2) 57. (1) 58. (2) 59. (3) 60. (2) 61. (2) 62. (3) 63. (1) 64. (4) 65. (2) 66. (4) 67. (2) 68. (1) 69. (3) 70. (2) 71. (4) 72. (3) 73. (2) 74. (4) 75. (2) 76. (3) 77. (1) 78. (4) 79. (2) 80. (4) 81. (3) 82. (1) 83. (2) 84. (3) 85. (4) 86. (3) 87. (1) 88. (2) 89. (2) 90. (3) 91. (2) 92. (3) 93. (2) 94. (4) 95. (4) 96. (1) 97. (3) 98. (4) 99. (1) 100. (4) MAT 1. (2) 2. (4) 3. (1) 4. (3) 5. (2) 6. (1) 7. (3) 8. (4) 9. (1) 10. (3) 11. (2) 12. (3) 13. (1) 14. (2) 15. (4) 16. (2) 17. (3) 18. (1) 19. (1) 20. (3) 21. (1) 22. (2) 23. (3) 24. (4) 25. (3) 26. (2) 27. (4) 28. (3) 29. (2) 30. (2) 31. (4) 32. (3) 33. (1) 34. (4) 35. (4) 36. (3) 37. (1) 38. (4) 39. (2) 40. (4) 41. (2) 42. (1) 43. (3) 44. (2) 45. (3) 46. (4) 47. (1) 48. (3) 49. (1) 50. (3) ENGLISH 1. (3) 2. (4) 3. (3) 4. (1) 5. (3) 6. (3) 7. (2) 8. (1) 9. (4) 10. (4) 11. (3) 12. (1) 13. (3) 14. (3) 15. (2) 16. (1) 17. (4) 18. (2) 19. (3) 20. (3) 21. (1) 22. (2) 23. (1) 24. (2) 25. (3) 26. (4) 27. (2) 28. (3) 29. (3) 30. (2) 31. (3) 32. (1) 33. (4) 34. (3) 35. (3) 36. (4) 37. (2) 38. (3) 39. (2) 40. (4) 41. (2) 42. (1) 43. (3) 44. (4) 45. (1) 46. (3) 47. (1) 48. (3) 49. (2) 50. (4) Page 2 NTSE-2017-18 (Stage-I) ANSWER KEYS SAT 1. (4) 2. (3) 3. (4) 4. (2) 5. (2) 6. (1) 7. (3) 8. (4) 9. (1) 10. (2) 11. (1) 12. (4) 13. (4) 14. (3) 15. (3) 16. (2) 17. (4) 18. (2) 19. (4) 20. (2) 21. (2) 22. (1) 23. (3) 24. (1) 25. (1) 26. (1) 27. (3) 28. (3) 29. (3) 30. (2) 31. (3) 32. (1) 33. (3) 34. (3) 35. (2) 36. (4) 37. (1) 38. (4) 39. (1) 40. (3) 41. (3) 42. (2) 43. (4) 44. (3) 45. (3) 46. (3) 47. (2) 48. (2) 49. (4) 50. (3) 51. (2) 52. (2) 53. (1) 54. (3) 55. (2) 56. (2) 57. (1) 58. (2) 59. (3) 60. (2) 61. (2) 62. (3) 63. (1) 64. (4) 65. (2) 66. (4) 67. (2) 68. (1) 69. (3) 70. (2) 71. (4) 72. (3) 73. (2) 74. (4) 75. (2) 76. (3) 77. (1) 78. (4) 79. (2) 80. (4) 81. (3) 82. (1) 83. (2) 84. (3) 85. (4) 86. (3) 87. (1) 88. (2) 89. (2) 90. (3) 91. (2) 92. (3) 93. (2) 94. (4) 95. (4) 96. (1) 97. (3) 98. (4) 99. (1) 100. (4) MAT 1. (2) 2. (4) 3. (1) 4. (3) 5. (2) 6. (1) 7. (3) 8. (4) 9. (1) 10. (3) 11. (2) 12. (3) 13. (1) 14. (2) 15. (4) 16. (2) 17. (3) 18. (1) 19. (1) 20. (3) 21. (1) 22. (2) 23. (3) 24. (4) 25. (3) 26. (2) 27. (4) 28. (3) 29. (2) 30. (2) 31. (4) 32. (3) 33. (1) 34. (4) 35. (4) 36. (3) 37. (1) 38. (4) 39. (2) 40. (4) 41. (2) 42. (1) 43. (3) 44. (2) 45. (3) 46. (4) 47. (1) 48. (3) 49. (1) 50. (3) ENGLISH 1. (3) 2. (4) 3. (3) 4. (1) 5. (3) 6. (3) 7. (2) 8. (1) 9. (4) 10. (4) 11. (3) 12. (1) 13. (3) 14. (3) 15. (2) 16. (1) 17. (4) 18. (2) 19. (3) 20. (3) 21. (1) 22. (2) 23. (1) 24. (2) 25. (3) 26. (4) 27. (2) 28. (3) 29. (3) 30. (2) 31. (3) 32. (1) 33. (4) 34. (3) 35. (3) 36. (4) 37. (2) 38. (3) 39. (2) 40. (4) 41. (2) 42. (1) 43. (3) 44. (4) 45. (1) 46. (3) 47. (1) 48. (3) 49. (2) 50. (4) SAT Solutions 1. (A) Slope of distance time graph is constant for uniform speed (D) Slope of velocity time graph is zero for uniform speed 2. m b = 50 gm v b = 100 m/s m g = 10 kg v g = ? v g = ? ? ? ? 50 1000 b b g g –m v 100 v m 10 g 1 v m/ s 2 ? 3. 100m v=0 u v 2 – u 2 = 2g (100) o – u 2 = –2g (100) u 2 = 2g (100) ... (i) and when initial velocity is doubled (2u) 2 = 2gH ... (ii) ? ? ? ? ? ? 2 ii i 2 2gH 4u 2g 100 u ? H 400m ? 4. 2 GM g R ? ? 2 g M G R 5. 1 f T ? so, unit of frequency is (second) –1 . 6. v = ?f v = 10 × 1000 × 3 × 10 –3 v 30m/ s ? distance 3 t speed 30 ? ? ? ? 1 t 0.1 sec. 10 Page 3 NTSE-2017-18 (Stage-I) ANSWER KEYS SAT 1. (4) 2. (3) 3. (4) 4. (2) 5. (2) 6. (1) 7. (3) 8. (4) 9. (1) 10. (2) 11. (1) 12. (4) 13. (4) 14. (3) 15. (3) 16. (2) 17. (4) 18. (2) 19. (4) 20. (2) 21. (2) 22. (1) 23. (3) 24. (1) 25. (1) 26. (1) 27. (3) 28. (3) 29. (3) 30. (2) 31. (3) 32. (1) 33. (3) 34. (3) 35. (2) 36. (4) 37. (1) 38. (4) 39. (1) 40. (3) 41. (3) 42. (2) 43. (4) 44. (3) 45. (3) 46. (3) 47. (2) 48. (2) 49. (4) 50. (3) 51. (2) 52. (2) 53. (1) 54. (3) 55. (2) 56. (2) 57. (1) 58. (2) 59. (3) 60. (2) 61. (2) 62. (3) 63. (1) 64. (4) 65. (2) 66. (4) 67. (2) 68. (1) 69. (3) 70. (2) 71. (4) 72. (3) 73. (2) 74. (4) 75. (2) 76. (3) 77. (1) 78. (4) 79. (2) 80. (4) 81. (3) 82. (1) 83. (2) 84. (3) 85. (4) 86. (3) 87. (1) 88. (2) 89. (2) 90. (3) 91. (2) 92. (3) 93. (2) 94. (4) 95. (4) 96. (1) 97. (3) 98. (4) 99. (1) 100. (4) MAT 1. (2) 2. (4) 3. (1) 4. (3) 5. (2) 6. (1) 7. (3) 8. (4) 9. (1) 10. (3) 11. (2) 12. (3) 13. (1) 14. (2) 15. (4) 16. (2) 17. (3) 18. (1) 19. (1) 20. (3) 21. (1) 22. (2) 23. (3) 24. (4) 25. (3) 26. (2) 27. (4) 28. (3) 29. (2) 30. (2) 31. (4) 32. (3) 33. (1) 34. (4) 35. (4) 36. (3) 37. (1) 38. (4) 39. (2) 40. (4) 41. (2) 42. (1) 43. (3) 44. (2) 45. (3) 46. (4) 47. (1) 48. (3) 49. (1) 50. (3) ENGLISH 1. (3) 2. (4) 3. (3) 4. (1) 5. (3) 6. (3) 7. (2) 8. (1) 9. (4) 10. (4) 11. (3) 12. (1) 13. (3) 14. (3) 15. (2) 16. (1) 17. (4) 18. (2) 19. (3) 20. (3) 21. (1) 22. (2) 23. (1) 24. (2) 25. (3) 26. (4) 27. (2) 28. (3) 29. (3) 30. (2) 31. (3) 32. (1) 33. (4) 34. (3) 35. (3) 36. (4) 37. (2) 38. (3) 39. (2) 40. (4) 41. (2) 42. (1) 43. (3) 44. (4) 45. (1) 46. (3) 47. (1) 48. (3) 49. (2) 50. (4) SAT Solutions 1. (A) Slope of distance time graph is constant for uniform speed (D) Slope of velocity time graph is zero for uniform speed 2. m b = 50 gm v b = 100 m/s m g = 10 kg v g = ? v g = ? ? ? ? 50 1000 b b g g –m v 100 v m 10 g 1 v m/ s 2 ? 3. 100m v=0 u v 2 – u 2 = 2g (100) o – u 2 = –2g (100) u 2 = 2g (100) ... (i) and when initial velocity is doubled (2u) 2 = 2gH ... (ii) ? ? ? ? ? ? 2 ii i 2 2gH 4u 2g 100 u ? H 400m ? 4. 2 GM g R ? ? 2 g M G R 5. 1 f T ? so, unit of frequency is (second) –1 . 6. v = ?f v = 10 × 1000 × 3 × 10 –3 v 30m/ s ? distance 3 t speed 30 ? ? ? ? 1 t 0.1 sec. 10 7. F C P 8. f = +30 cm u = – 15 cm 1 1 1 f v u ? ? 1 1 1 v 30 15 ? ? V = –30 cm v 30 m 2 u 15 ? ? ? ? ? m 2 ? 9. Resistivity do not depend on shape and size of material. 10. 1 ? 1 ? 1 ? 2 ? 2 ? 2 ? 3 ? 3 ? 1/3 ? 2/3 ? A B R = 4 eq ? A eq 1 2 R 3 4 3 3 ? ? ? ? ? 11. Total power = 4 × 100 = 400 w Total energy = 400 × 6 × 30 = 72000 w - h = 72 kwh Total cost = 72 × 5 = 360 Rs. 13. When light travels from rarer to denser medium then light bends towards normal. 14. H HCl Cl ? ? ? ? ? ? ? acid Conjugate base 15. 3 2 2 0 H O 4 2 4 2 100 C CaSO .2H O CaSO .½H O ? ? ? ? ? ? CaSO 4 . ½H 2 O formula of plaster of paris 16. C 2 H 5 OH slow down the process of reaction 17. Non metal = Si have both property of metal and non metal 18. 3 3 2 1 3 2 | CH H C— C CH ? ? 2-methylprop-1-ene 19. C – CH – CH – CH – CH – C – 2 2 2 2 O NH – 2 2 2 2 2 2 CH – CH – CH – CH – CH – CH – NH adipic acid hexamethylene diamine O ] ] Page 4 NTSE-2017-18 (Stage-I) ANSWER KEYS SAT 1. (4) 2. (3) 3. (4) 4. (2) 5. (2) 6. (1) 7. (3) 8. (4) 9. (1) 10. (2) 11. (1) 12. (4) 13. (4) 14. (3) 15. (3) 16. (2) 17. (4) 18. (2) 19. (4) 20. (2) 21. (2) 22. (1) 23. (3) 24. (1) 25. (1) 26. (1) 27. (3) 28. (3) 29. (3) 30. (2) 31. (3) 32. (1) 33. (3) 34. (3) 35. (2) 36. (4) 37. (1) 38. (4) 39. (1) 40. (3) 41. (3) 42. (2) 43. (4) 44. (3) 45. (3) 46. (3) 47. (2) 48. (2) 49. (4) 50. (3) 51. (2) 52. (2) 53. (1) 54. (3) 55. (2) 56. (2) 57. (1) 58. (2) 59. (3) 60. (2) 61. (2) 62. (3) 63. (1) 64. (4) 65. (2) 66. (4) 67. (2) 68. (1) 69. (3) 70. (2) 71. (4) 72. (3) 73. (2) 74. (4) 75. (2) 76. (3) 77. (1) 78. (4) 79. (2) 80. (4) 81. (3) 82. (1) 83. (2) 84. (3) 85. (4) 86. (3) 87. (1) 88. (2) 89. (2) 90. (3) 91. (2) 92. (3) 93. (2) 94. (4) 95. (4) 96. (1) 97. (3) 98. (4) 99. (1) 100. (4) MAT 1. (2) 2. (4) 3. (1) 4. (3) 5. (2) 6. (1) 7. (3) 8. (4) 9. (1) 10. (3) 11. (2) 12. (3) 13. (1) 14. (2) 15. (4) 16. (2) 17. (3) 18. (1) 19. (1) 20. (3) 21. (1) 22. (2) 23. (3) 24. (4) 25. (3) 26. (2) 27. (4) 28. (3) 29. (2) 30. (2) 31. (4) 32. (3) 33. (1) 34. (4) 35. (4) 36. (3) 37. (1) 38. (4) 39. (2) 40. (4) 41. (2) 42. (1) 43. (3) 44. (2) 45. (3) 46. (4) 47. (1) 48. (3) 49. (1) 50. (3) ENGLISH 1. (3) 2. (4) 3. (3) 4. (1) 5. (3) 6. (3) 7. (2) 8. (1) 9. (4) 10. (4) 11. (3) 12. (1) 13. (3) 14. (3) 15. (2) 16. (1) 17. (4) 18. (2) 19. (3) 20. (3) 21. (1) 22. (2) 23. (1) 24. (2) 25. (3) 26. (4) 27. (2) 28. (3) 29. (3) 30. (2) 31. (3) 32. (1) 33. (4) 34. (3) 35. (3) 36. (4) 37. (2) 38. (3) 39. (2) 40. (4) 41. (2) 42. (1) 43. (3) 44. (4) 45. (1) 46. (3) 47. (1) 48. (3) 49. (2) 50. (4) SAT Solutions 1. (A) Slope of distance time graph is constant for uniform speed (D) Slope of velocity time graph is zero for uniform speed 2. m b = 50 gm v b = 100 m/s m g = 10 kg v g = ? v g = ? ? ? ? 50 1000 b b g g –m v 100 v m 10 g 1 v m/ s 2 ? 3. 100m v=0 u v 2 – u 2 = 2g (100) o – u 2 = –2g (100) u 2 = 2g (100) ... (i) and when initial velocity is doubled (2u) 2 = 2gH ... (ii) ? ? ? ? ? ? 2 ii i 2 2gH 4u 2g 100 u ? H 400m ? 4. 2 GM g R ? ? 2 g M G R 5. 1 f T ? so, unit of frequency is (second) –1 . 6. v = ?f v = 10 × 1000 × 3 × 10 –3 v 30m/ s ? distance 3 t speed 30 ? ? ? ? 1 t 0.1 sec. 10 7. F C P 8. f = +30 cm u = – 15 cm 1 1 1 f v u ? ? 1 1 1 v 30 15 ? ? V = –30 cm v 30 m 2 u 15 ? ? ? ? ? m 2 ? 9. Resistivity do not depend on shape and size of material. 10. 1 ? 1 ? 1 ? 2 ? 2 ? 2 ? 3 ? 3 ? 1/3 ? 2/3 ? A B R = 4 eq ? A eq 1 2 R 3 4 3 3 ? ? ? ? ? 11. Total power = 4 × 100 = 400 w Total energy = 400 × 6 × 30 = 72000 w - h = 72 kwh Total cost = 72 × 5 = 360 Rs. 13. When light travels from rarer to denser medium then light bends towards normal. 14. H HCl Cl ? ? ? ? ? ? ? acid Conjugate base 15. 3 2 2 0 H O 4 2 4 2 100 C CaSO .2H O CaSO .½H O ? ? ? ? ? ? CaSO 4 . ½H 2 O formula of plaster of paris 16. C 2 H 5 OH slow down the process of reaction 17. Non metal = Si have both property of metal and non metal 18. 3 3 2 1 3 2 | CH H C— C CH ? ? 2-methylprop-1-ene 19. C – CH – CH – CH – CH – C – 2 2 2 2 O NH – 2 2 2 2 2 2 CH – CH – CH – CH – CH – CH – NH adipic acid hexamethylene diamine O ] ] 20. NH 4 Cl + NaCl sublime not sublime 21. w mole M ? Molecular weight of N 2 = 2 × 14 = 28 14 28 ? = ½ ? ? ? A A N mole N 1 N N 2 N = 3.011 × 10 23 22. S ? K L M 16 2 8 6 23. Fe ? Fe +2 , Fe +3 24. Al 2 (CO 3 ) 3 [ Al CO ] +3 –2 3 25. Freon – 112 is C 2 F 2 Cl 4 26. Mg + Cl 2 ? MgCl 2 (high MP/BP) MgCl 2 is ionic compound ? ionic compound have high Mg (OH) 2 melting and boiling point water soluble 27. Sclerenchyma is simple permanent tissue in which lignin is present which makes it dead & it provides mechanical strength as in the fibrous covering of coconut. 28. Nucleus is the headquarter of the cell which control activities of cell and discovered by Robert Brown. 29. Cytokinin is a plant hormone which mainly control cell division & promote growth in plants. 30. As Lichens are SO 2 sensititive and can’t grow in the area where sulphur dioxide pollution is present. 31. Cycas & Pinus are gymnosperms which are perennial, evergreen & woody. 32. Vacuole maintains the osmotic pressure in plants & maintain turgidity. 33. As sunlight, chlorophyll, CO 2 are the main elements essential for photosynthesis. 34. The nature of nerve impulse is both electrical & chemical, so electrochemical. 35. As uric acid is the main component of their excretory waste. So uricotelic. Page 5 NTSE-2017-18 (Stage-I) ANSWER KEYS SAT 1. (4) 2. (3) 3. (4) 4. (2) 5. (2) 6. (1) 7. (3) 8. (4) 9. (1) 10. (2) 11. (1) 12. (4) 13. (4) 14. (3) 15. (3) 16. (2) 17. (4) 18. (2) 19. (4) 20. (2) 21. (2) 22. (1) 23. (3) 24. (1) 25. (1) 26. (1) 27. (3) 28. (3) 29. (3) 30. (2) 31. (3) 32. (1) 33. (3) 34. (3) 35. (2) 36. (4) 37. (1) 38. (4) 39. (1) 40. (3) 41. (3) 42. (2) 43. (4) 44. (3) 45. (3) 46. (3) 47. (2) 48. (2) 49. (4) 50. (3) 51. (2) 52. (2) 53. (1) 54. (3) 55. (2) 56. (2) 57. (1) 58. (2) 59. (3) 60. (2) 61. (2) 62. (3) 63. (1) 64. (4) 65. (2) 66. (4) 67. (2) 68. (1) 69. (3) 70. (2) 71. (4) 72. (3) 73. (2) 74. (4) 75. (2) 76. (3) 77. (1) 78. (4) 79. (2) 80. (4) 81. (3) 82. (1) 83. (2) 84. (3) 85. (4) 86. (3) 87. (1) 88. (2) 89. (2) 90. (3) 91. (2) 92. (3) 93. (2) 94. (4) 95. (4) 96. (1) 97. (3) 98. (4) 99. (1) 100. (4) MAT 1. (2) 2. (4) 3. (1) 4. (3) 5. (2) 6. (1) 7. (3) 8. (4) 9. (1) 10. (3) 11. (2) 12. (3) 13. (1) 14. (2) 15. (4) 16. (2) 17. (3) 18. (1) 19. (1) 20. (3) 21. (1) 22. (2) 23. (3) 24. (4) 25. (3) 26. (2) 27. (4) 28. (3) 29. (2) 30. (2) 31. (4) 32. (3) 33. (1) 34. (4) 35. (4) 36. (3) 37. (1) 38. (4) 39. (2) 40. (4) 41. (2) 42. (1) 43. (3) 44. (2) 45. (3) 46. (4) 47. (1) 48. (3) 49. (1) 50. (3) ENGLISH 1. (3) 2. (4) 3. (3) 4. (1) 5. (3) 6. (3) 7. (2) 8. (1) 9. (4) 10. (4) 11. (3) 12. (1) 13. (3) 14. (3) 15. (2) 16. (1) 17. (4) 18. (2) 19. (3) 20. (3) 21. (1) 22. (2) 23. (1) 24. (2) 25. (3) 26. (4) 27. (2) 28. (3) 29. (3) 30. (2) 31. (3) 32. (1) 33. (4) 34. (3) 35. (3) 36. (4) 37. (2) 38. (3) 39. (2) 40. (4) 41. (2) 42. (1) 43. (3) 44. (4) 45. (1) 46. (3) 47. (1) 48. (3) 49. (2) 50. (4) SAT Solutions 1. (A) Slope of distance time graph is constant for uniform speed (D) Slope of velocity time graph is zero for uniform speed 2. m b = 50 gm v b = 100 m/s m g = 10 kg v g = ? v g = ? ? ? ? 50 1000 b b g g –m v 100 v m 10 g 1 v m/ s 2 ? 3. 100m v=0 u v 2 – u 2 = 2g (100) o – u 2 = –2g (100) u 2 = 2g (100) ... (i) and when initial velocity is doubled (2u) 2 = 2gH ... (ii) ? ? ? ? ? ? 2 ii i 2 2gH 4u 2g 100 u ? H 400m ? 4. 2 GM g R ? ? 2 g M G R 5. 1 f T ? so, unit of frequency is (second) –1 . 6. v = ?f v = 10 × 1000 × 3 × 10 –3 v 30m/ s ? distance 3 t speed 30 ? ? ? ? 1 t 0.1 sec. 10 7. F C P 8. f = +30 cm u = – 15 cm 1 1 1 f v u ? ? 1 1 1 v 30 15 ? ? V = –30 cm v 30 m 2 u 15 ? ? ? ? ? m 2 ? 9. Resistivity do not depend on shape and size of material. 10. 1 ? 1 ? 1 ? 2 ? 2 ? 2 ? 3 ? 3 ? 1/3 ? 2/3 ? A B R = 4 eq ? A eq 1 2 R 3 4 3 3 ? ? ? ? ? 11. Total power = 4 × 100 = 400 w Total energy = 400 × 6 × 30 = 72000 w - h = 72 kwh Total cost = 72 × 5 = 360 Rs. 13. When light travels from rarer to denser medium then light bends towards normal. 14. H HCl Cl ? ? ? ? ? ? ? acid Conjugate base 15. 3 2 2 0 H O 4 2 4 2 100 C CaSO .2H O CaSO .½H O ? ? ? ? ? ? CaSO 4 . ½H 2 O formula of plaster of paris 16. C 2 H 5 OH slow down the process of reaction 17. Non metal = Si have both property of metal and non metal 18. 3 3 2 1 3 2 | CH H C— C CH ? ? 2-methylprop-1-ene 19. C – CH – CH – CH – CH – C – 2 2 2 2 O NH – 2 2 2 2 2 2 CH – CH – CH – CH – CH – CH – NH adipic acid hexamethylene diamine O ] ] 20. NH 4 Cl + NaCl sublime not sublime 21. w mole M ? Molecular weight of N 2 = 2 × 14 = 28 14 28 ? = ½ ? ? ? A A N mole N 1 N N 2 N = 3.011 × 10 23 22. S ? K L M 16 2 8 6 23. Fe ? Fe +2 , Fe +3 24. Al 2 (CO 3 ) 3 [ Al CO ] +3 –2 3 25. Freon – 112 is C 2 F 2 Cl 4 26. Mg + Cl 2 ? MgCl 2 (high MP/BP) MgCl 2 is ionic compound ? ionic compound have high Mg (OH) 2 melting and boiling point water soluble 27. Sclerenchyma is simple permanent tissue in which lignin is present which makes it dead & it provides mechanical strength as in the fibrous covering of coconut. 28. Nucleus is the headquarter of the cell which control activities of cell and discovered by Robert Brown. 29. Cytokinin is a plant hormone which mainly control cell division & promote growth in plants. 30. As Lichens are SO 2 sensititive and can’t grow in the area where sulphur dioxide pollution is present. 31. Cycas & Pinus are gymnosperms which are perennial, evergreen & woody. 32. Vacuole maintains the osmotic pressure in plants & maintain turgidity. 33. As sunlight, chlorophyll, CO 2 are the main elements essential for photosynthesis. 34. The nature of nerve impulse is both electrical & chemical, so electrochemical. 35. As uric acid is the main component of their excretory waste. So uricotelic. 36. Monohybrid Cross Parents - Tall × dwarf TT × tt Gametes - T T t t T T t t Tt Tt Tt Tt F generation - Tt (tall) 1 selfing Tt × Tt Gametes - T t T t F generation - Phenotypic ratio - 3 : 1 tall : dwarf 2 Genotypic ratio - 1 : 2 : 1 TT : Tt : tt T t T t TT Tt Tt tt 37. Cartilage is skeletal connective tissue which forms endoskeleton of human body. 38. Echidna is a mammal & lay eggs & act as a connecting link between reptiles & mammals. 39. As it does not pass from one person to other, so non-communicable. 40. They have a pseudocoelom as the coelom is partially lined by the tissue derived from mesoderm. 41. ? 3 2 3 3 – 3 = ? ? ? ? 3 2 3 (3 3) 3 – 3 (3 3) = ? ? ? ? ? 9 3 3 6 3 6 15 9 3 9 – 3 6 = ? 15 9 3 6 6 = a 3 b ? ? a = ? 15 9 b 6 6 ? a b ? = 2Read More
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