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 Page 1


   
 
        
                                                                           
 
 
 
 
 
 
 
 
NTSE STAGE – 1(2019-20) 
SAT           
 
ANSWER KEYS 
 
 
 
 
Ques Ans Ques Ans Ques Ans Ques Ans 
1.  C 26. B 51. C 76. C 
2.  C 27. B 52. B 77. D 
3.  B 28.  C 53. A 78. A 
4.  C 29. B 54. C 79. C 
5.  B 30. B 55. D 80. A 
6.  C 31. B 56. C 81. D 
7.  B 32. B 57. C 82. C 
8.  A 33. D 58. B 83. A 
9.  A 34. A 59. C 84. A 
10.  A 35. A 60. C 85. C 
11.  D 36. C 61. D 86. B 
12.  D 37. D 62. B 87. D 
13.  D 38. B 63. B 88. C 
14.  C 39. A 64. A 89. D 
15.  C 40. A 65. B 90. A 
16.  C 41. C 66. C 91. A 
17.  D 42. A 67. A 92. D 
18.  C 43. C 68. B 93. A 
19.  B 44. D 69. C 94. C 
20.  C 45. A 70. D 95. C 
21.  A 46. D 71. B 96. B 
22.  C 47. D 72. A 97. C 
23.  D 48. A 73. B 98. B 
24.  B 49. C 74. D 99. A 
25.  D 50. B 75. A 100. B 
 
 
 
 
 
 
 
 
Page 2


   
 
        
                                                                           
 
 
 
 
 
 
 
 
NTSE STAGE – 1(2019-20) 
SAT           
 
ANSWER KEYS 
 
 
 
 
Ques Ans Ques Ans Ques Ans Ques Ans 
1.  C 26. B 51. C 76. C 
2.  C 27. B 52. B 77. D 
3.  B 28.  C 53. A 78. A 
4.  C 29. B 54. C 79. C 
5.  B 30. B 55. D 80. A 
6.  C 31. B 56. C 81. D 
7.  B 32. B 57. C 82. C 
8.  A 33. D 58. B 83. A 
9.  A 34. A 59. C 84. A 
10.  A 35. A 60. C 85. C 
11.  D 36. C 61. D 86. B 
12.  D 37. D 62. B 87. D 
13.  D 38. B 63. B 88. C 
14.  C 39. A 64. A 89. D 
15.  C 40. A 65. B 90. A 
16.  C 41. C 66. C 91. A 
17.  D 42. A 67. A 92. D 
18.  C 43. C 68. B 93. A 
19.  B 44. D 69. C 94. C 
20.  C 45. A 70. D 95. C 
21.  A 46. D 71. B 96. B 
22.  C 47. D 72. A 97. C 
23.  D 48. A 73. B 98. B 
24.  B 49. C 74. D 99. A 
25.  D 50. B 75. A 100. B 
 
 
 
 
 
 
 
 
   
 
        
                                                                           
 
 
SOLUTIONS 
 
 
 
1. C 
Newton Second is equivalent to = NS 
The quantities are Force x Time 
  ma t ? 
  
v
mt
t
= ? ? 
  mv = 
  P = 
 = Linear momentum 
 
2. C 
Q ne = 
19 18
18
19
10 100 10 1
6.25 10
1.6 10 1.6 16
Q
n
e
-
?
= = = = = ?
?
electrons 
 
3. B 
A radioactive nucleus doesn’t emit Alpha & Beta radiations simultaneously. Some nucleus emit Alpha particles, some 
Beta particles. They form a new nucleus and radiate Gamma rays to come back to lower energy state. So 
 
4. C 
The quantity remains unchanged is transformer is frequently 
 
5. B 
10 R cm = 
5 f cm =- 
1 1 1
t v u
=+ 
1 1 1
5 20 v
=+
--
 
1 1 1
20 5 v
-= 
1 4 1
20 v
-
= 
31
20 v
-
= 
20
3
v
-
= 
Now, 
( )
20
3
20
v
m
u
??
-
??
-
??
= = -
-
 
20 1
3 20
m = - ? 
1
3
m
-
= 
 
 
 
Page 3


   
 
        
                                                                           
 
 
 
 
 
 
 
 
NTSE STAGE – 1(2019-20) 
SAT           
 
ANSWER KEYS 
 
 
 
 
Ques Ans Ques Ans Ques Ans Ques Ans 
1.  C 26. B 51. C 76. C 
2.  C 27. B 52. B 77. D 
3.  B 28.  C 53. A 78. A 
4.  C 29. B 54. C 79. C 
5.  B 30. B 55. D 80. A 
6.  C 31. B 56. C 81. D 
7.  B 32. B 57. C 82. C 
8.  A 33. D 58. B 83. A 
9.  A 34. A 59. C 84. A 
10.  A 35. A 60. C 85. C 
11.  D 36. C 61. D 86. B 
12.  D 37. D 62. B 87. D 
13.  D 38. B 63. B 88. C 
14.  C 39. A 64. A 89. D 
15.  C 40. A 65. B 90. A 
16.  C 41. C 66. C 91. A 
17.  D 42. A 67. A 92. D 
18.  C 43. C 68. B 93. A 
19.  B 44. D 69. C 94. C 
20.  C 45. A 70. D 95. C 
21.  A 46. D 71. B 96. B 
22.  C 47. D 72. A 97. C 
23.  D 48. A 73. B 98. B 
24.  B 49. C 74. D 99. A 
25.  D 50. B 75. A 100. B 
 
 
 
 
 
 
 
 
   
 
        
                                                                           
 
 
SOLUTIONS 
 
 
 
1. C 
Newton Second is equivalent to = NS 
The quantities are Force x Time 
  ma t ? 
  
v
mt
t
= ? ? 
  mv = 
  P = 
 = Linear momentum 
 
2. C 
Q ne = 
19 18
18
19
10 100 10 1
6.25 10
1.6 10 1.6 16
Q
n
e
-
?
= = = = = ?
?
electrons 
 
3. B 
A radioactive nucleus doesn’t emit Alpha & Beta radiations simultaneously. Some nucleus emit Alpha particles, some 
Beta particles. They form a new nucleus and radiate Gamma rays to come back to lower energy state. So 
 
4. C 
The quantity remains unchanged is transformer is frequently 
 
5. B 
10 R cm = 
5 f cm =- 
1 1 1
t v u
=+ 
1 1 1
5 20 v
=+
--
 
1 1 1
20 5 v
-= 
1 4 1
20 v
-
= 
31
20 v
-
= 
20
3
v
-
= 
Now, 
( )
20
3
20
v
m
u
??
-
??
-
??
= = -
-
 
20 1
3 20
m = - ? 
1
3
m
-
= 
 
 
 
   
 
        
                                                                           
6. C 
In series 
S
R nR = 
P
R
R
n
= 
S
P
R nR
R R
n
=
??
??
??
 
S
P
R n
nR
RR
=? 
2 S
P
R
n
R
= 
 
7. B 
60 P watt = 
1000
watt hour ?
= 
( ) ( ) 2 60 5 30
1000
? ? ?
= 
18Units = 
Now Bill = 2 18 ? 
  = 36Rs 
 
8. A 
2
2
P
K
m
= 
2
11
2
22
KP
KP
= 
2
1
2
100
200
K
K
??
=
??
??
 
1
2
1
4
K
K
= 
21
4 KK = 
% Increase = 
11
1
4
100%
KK
K
-
? 
       = 3 100% ? 
       = 300% 
 
9. A 
1
4
A
B
M
M
= 
AB
VV = 
m
S
v
= 
A A B
B B A
S m V
S m V
=? 
11
41
A
B
S
S
=? 
 
Page 4


   
 
        
                                                                           
 
 
 
 
 
 
 
 
NTSE STAGE – 1(2019-20) 
SAT           
 
ANSWER KEYS 
 
 
 
 
Ques Ans Ques Ans Ques Ans Ques Ans 
1.  C 26. B 51. C 76. C 
2.  C 27. B 52. B 77. D 
3.  B 28.  C 53. A 78. A 
4.  C 29. B 54. C 79. C 
5.  B 30. B 55. D 80. A 
6.  C 31. B 56. C 81. D 
7.  B 32. B 57. C 82. C 
8.  A 33. D 58. B 83. A 
9.  A 34. A 59. C 84. A 
10.  A 35. A 60. C 85. C 
11.  D 36. C 61. D 86. B 
12.  D 37. D 62. B 87. D 
13.  D 38. B 63. B 88. C 
14.  C 39. A 64. A 89. D 
15.  C 40. A 65. B 90. A 
16.  C 41. C 66. C 91. A 
17.  D 42. A 67. A 92. D 
18.  C 43. C 68. B 93. A 
19.  B 44. D 69. C 94. C 
20.  C 45. A 70. D 95. C 
21.  A 46. D 71. B 96. B 
22.  C 47. D 72. A 97. C 
23.  D 48. A 73. B 98. B 
24.  B 49. C 74. D 99. A 
25.  D 50. B 75. A 100. B 
 
 
 
 
 
 
 
 
   
 
        
                                                                           
 
 
SOLUTIONS 
 
 
 
1. C 
Newton Second is equivalent to = NS 
The quantities are Force x Time 
  ma t ? 
  
v
mt
t
= ? ? 
  mv = 
  P = 
 = Linear momentum 
 
2. C 
Q ne = 
19 18
18
19
10 100 10 1
6.25 10
1.6 10 1.6 16
Q
n
e
-
?
= = = = = ?
?
electrons 
 
3. B 
A radioactive nucleus doesn’t emit Alpha & Beta radiations simultaneously. Some nucleus emit Alpha particles, some 
Beta particles. They form a new nucleus and radiate Gamma rays to come back to lower energy state. So 
 
4. C 
The quantity remains unchanged is transformer is frequently 
 
5. B 
10 R cm = 
5 f cm =- 
1 1 1
t v u
=+ 
1 1 1
5 20 v
=+
--
 
1 1 1
20 5 v
-= 
1 4 1
20 v
-
= 
31
20 v
-
= 
20
3
v
-
= 
Now, 
( )
20
3
20
v
m
u
??
-
??
-
??
= = -
-
 
20 1
3 20
m = - ? 
1
3
m
-
= 
 
 
 
   
 
        
                                                                           
6. C 
In series 
S
R nR = 
P
R
R
n
= 
S
P
R nR
R R
n
=
??
??
??
 
S
P
R n
nR
RR
=? 
2 S
P
R
n
R
= 
 
7. B 
60 P watt = 
1000
watt hour ?
= 
( ) ( ) 2 60 5 30
1000
? ? ?
= 
18Units = 
Now Bill = 2 18 ? 
  = 36Rs 
 
8. A 
2
2
P
K
m
= 
2
11
2
22
KP
KP
= 
2
1
2
100
200
K
K
??
=
??
??
 
1
2
1
4
K
K
= 
21
4 KK = 
% Increase = 
11
1
4
100%
KK
K
-
? 
       = 3 100% ? 
       = 300% 
 
9. A 
1
4
A
B
M
M
= 
AB
VV = 
m
S
v
= 
A A B
B B A
S m V
S m V
=? 
11
41
A
B
S
S
=? 
 
   
 
        
                                                                           
10. A 
24 cycles in 0.8 seconds 
by unitary method in 0.8 second no. of cycles=24 
in 1 second  
1 24
30
0.8
cycles
?
= 
 
11. D 
2
/ sec
60 30
w rad
t
= = = 
 
12. D 
 
13. D 
 
1 1 100
4
ww
Pf
fP
= ? = = 
 
25 f cm = 
 
14. C 
? ?
24
K HgI 
? ?
2 2 4
2KI HgI K HgI + ? ? ? 
 
15. C 
4 AC +? , density of water = 1gm/ml 
SO, mass of a single drop    = 0.018 1g ? 
      = 0.018g 
      No. of moles of     
3
2
0.018
10
18
HO
-
== 
So, no. of 
2
HO molecules = 
3
10
A
N
-
? 
    = 
3 23
10 6.023 10
-
?? 
    = 
20
6.023 10 ? 
 
16. C 
Not gives H
+
ion in aqueous solution 
 
17. D 
Concentration of 
2
40
NaOH M = 
     0.05M = 
 
? ?
2
5 10 OH
-
- = ? 
( )
2
log 5 10 2 log5 POH
-
= - ? = - 
   
10
2 log
2
=- 
   1 log2 1.3 = + = 
So, 14 14 1.3 12.7 PH POH = - = - = 
 
18. C 
Dolomite = 
33
MgCO CaCO ? 
 
 
 
 
Page 5


   
 
        
                                                                           
 
 
 
 
 
 
 
 
NTSE STAGE – 1(2019-20) 
SAT           
 
ANSWER KEYS 
 
 
 
 
Ques Ans Ques Ans Ques Ans Ques Ans 
1.  C 26. B 51. C 76. C 
2.  C 27. B 52. B 77. D 
3.  B 28.  C 53. A 78. A 
4.  C 29. B 54. C 79. C 
5.  B 30. B 55. D 80. A 
6.  C 31. B 56. C 81. D 
7.  B 32. B 57. C 82. C 
8.  A 33. D 58. B 83. A 
9.  A 34. A 59. C 84. A 
10.  A 35. A 60. C 85. C 
11.  D 36. C 61. D 86. B 
12.  D 37. D 62. B 87. D 
13.  D 38. B 63. B 88. C 
14.  C 39. A 64. A 89. D 
15.  C 40. A 65. B 90. A 
16.  C 41. C 66. C 91. A 
17.  D 42. A 67. A 92. D 
18.  C 43. C 68. B 93. A 
19.  B 44. D 69. C 94. C 
20.  C 45. A 70. D 95. C 
21.  A 46. D 71. B 96. B 
22.  C 47. D 72. A 97. C 
23.  D 48. A 73. B 98. B 
24.  B 49. C 74. D 99. A 
25.  D 50. B 75. A 100. B 
 
 
 
 
 
 
 
 
   
 
        
                                                                           
 
 
SOLUTIONS 
 
 
 
1. C 
Newton Second is equivalent to = NS 
The quantities are Force x Time 
  ma t ? 
  
v
mt
t
= ? ? 
  mv = 
  P = 
 = Linear momentum 
 
2. C 
Q ne = 
19 18
18
19
10 100 10 1
6.25 10
1.6 10 1.6 16
Q
n
e
-
?
= = = = = ?
?
electrons 
 
3. B 
A radioactive nucleus doesn’t emit Alpha & Beta radiations simultaneously. Some nucleus emit Alpha particles, some 
Beta particles. They form a new nucleus and radiate Gamma rays to come back to lower energy state. So 
 
4. C 
The quantity remains unchanged is transformer is frequently 
 
5. B 
10 R cm = 
5 f cm =- 
1 1 1
t v u
=+ 
1 1 1
5 20 v
=+
--
 
1 1 1
20 5 v
-= 
1 4 1
20 v
-
= 
31
20 v
-
= 
20
3
v
-
= 
Now, 
( )
20
3
20
v
m
u
??
-
??
-
??
= = -
-
 
20 1
3 20
m = - ? 
1
3
m
-
= 
 
 
 
   
 
        
                                                                           
6. C 
In series 
S
R nR = 
P
R
R
n
= 
S
P
R nR
R R
n
=
??
??
??
 
S
P
R n
nR
RR
=? 
2 S
P
R
n
R
= 
 
7. B 
60 P watt = 
1000
watt hour ?
= 
( ) ( ) 2 60 5 30
1000
? ? ?
= 
18Units = 
Now Bill = 2 18 ? 
  = 36Rs 
 
8. A 
2
2
P
K
m
= 
2
11
2
22
KP
KP
= 
2
1
2
100
200
K
K
??
=
??
??
 
1
2
1
4
K
K
= 
21
4 KK = 
% Increase = 
11
1
4
100%
KK
K
-
? 
       = 3 100% ? 
       = 300% 
 
9. A 
1
4
A
B
M
M
= 
AB
VV = 
m
S
v
= 
A A B
B B A
S m V
S m V
=? 
11
41
A
B
S
S
=? 
 
   
 
        
                                                                           
10. A 
24 cycles in 0.8 seconds 
by unitary method in 0.8 second no. of cycles=24 
in 1 second  
1 24
30
0.8
cycles
?
= 
 
11. D 
2
/ sec
60 30
w rad
t
= = = 
 
12. D 
 
13. D 
 
1 1 100
4
ww
Pf
fP
= ? = = 
 
25 f cm = 
 
14. C 
? ?
24
K HgI 
? ?
2 2 4
2KI HgI K HgI + ? ? ? 
 
15. C 
4 AC +? , density of water = 1gm/ml 
SO, mass of a single drop    = 0.018 1g ? 
      = 0.018g 
      No. of moles of     
3
2
0.018
10
18
HO
-
== 
So, no. of 
2
HO molecules = 
3
10
A
N
-
? 
    = 
3 23
10 6.023 10
-
?? 
    = 
20
6.023 10 ? 
 
16. C 
Not gives H
+
ion in aqueous solution 
 
17. D 
Concentration of 
2
40
NaOH M = 
     0.05M = 
 
? ?
2
5 10 OH
-
- = ? 
( )
2
log 5 10 2 log5 POH
-
= - ? = - 
   
10
2 log
2
=- 
   1 log2 1.3 = + = 
So, 14 14 1.3 12.7 PH POH = - = - = 
 
18. C 
Dolomite = 
33
MgCO CaCO ? 
 
 
 
 
   
 
        
                                                                           
19. B 
373
4 2 4 2 2
13
2
22
K
CaSO H O CaSO H O H O ? ? ? ? ? ? + 
 
20. C 
Zn is more reactive than Hydrogen 
 
21. A 
K is most electropositive 
 
22. C 
NaCN Sodium carbon bond is ionic and carbon-nitrogen bond is covalent 
 
23. D 
18 
 
24. B 
( ) ( )
22
C s H O g CO H + ? + 
 
25. D 
 
26. B 
 % Mole 
Simplest 
reaction 
C 75 
75
6.25
12
= 1 
H 25 
25
25
1
= 4 
Emprical formulae = 
4
CH 
 
27. B 
R.H. Whittaker proposed 5 kingdom classification and isolated kingdom fungi which has characteristic of both kingdom 
Plantae and Animalia. Because it was difficult to place the organisms in either of the two kingdom due to its mode of 
nutrition and cellular organization. 
 
28. C 
Plasma membrane is selectively permeable which selectively transports ions in and out of cell and maintains osmotic 
potential. 
 
29. B 
Insulin is a hormone that is secreted by Beta cells of Islet of Langerhann of pancreas, that binds the free glucose 
circulating in blood and controls the condition of hyperglycemia. 
 
30.  B 
 
 
31.  B 
Photolysis of water occurs in presence of light during photosynthesis. Photolysis results in formation of oxygen. 
2H 2O -------- ? 4H
+
 + O 2 +  2e-

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The "Chhattisgarh: State Level Answer Key (SAT) - 2019-20 Class 10 Questions" guide is a valuable resource for all aspiring students preparing for the Class 10 exam. It focuses on providing a wide range of practice questions to help students gauge their understanding of the exam topics. These questions cover the entire syllabus, ensuring comprehensive preparation. The guide includes previous years' question papers for students to familiarize themselves with the exam's format and difficulty level. Additionally, it offers subject-specific question banks, allowing students to focus on weak areas and improve their performance.

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Students of Class 10 can study Chhattisgarh: State Level Answer Key (SAT) - 2019-20 alongwith tests & analysis from the EduRev app, which will help them while preparing for their exam. Apart from the Chhattisgarh: State Level Answer Key (SAT) - 2019-20, students can also utilize the EduRev App for other study materials such as previous year question papers, syllabus, important questions, etc. The EduRev App will make your learning easier as you can access it from anywhere you want. The content of Chhattisgarh: State Level Answer Key (SAT) - 2019-20 is prepared as per the latest Class 10 syllabus.

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