Rajasthan: State Level Answer Key & Solutions (Sat, Mat & Lang) - 2017-18

 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 ? = 2