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 Page 1


 
KARNATAKA NTSE - STAGE 1 (2017) 
         
 
 
ANSWER KEY & SOLUTIONS 
PHYSICS 
 
1. A ( 2) 2.A ? ? ? ? 
Magnitude doubles & direction becomes opposite. 
(2) 
 
2. Area under v - t graph ? change in displacement of the practical 
(3) 
 
3. 4 mm 
12
12
4
4
p
mv mv
vv
?
?
 
1
K 
2
K 
22
1 1 2 2
22
22
22
22
12
11
4
22
11
(4 ) 4
22
11
16 4
22
: 4 :1
K mv K mv
m v mv
mv mv
KK
??
??
? ? ? ?
??
? ? ? ?
? ? ? ?
?
 
(2) 
 
4. (2) 
 
 
 Real inverted diminished 
 
 
 
 
5. (2) 
(A) ? correct 
(R) ? correct 
? angle of incidence ? critical angle for TIR 
 
6. 
11
11 12
22
6.67 10 2 16
13 34 10
4
mm
F G N
R
?
?
? ? ?
? ? ? ? ? 
(2) 
 
7. (1) 
 
8. (1) 
 
 
F C
Page 2


 
KARNATAKA NTSE - STAGE 1 (2017) 
         
 
 
ANSWER KEY & SOLUTIONS 
PHYSICS 
 
1. A ( 2) 2.A ? ? ? ? 
Magnitude doubles & direction becomes opposite. 
(2) 
 
2. Area under v - t graph ? change in displacement of the practical 
(3) 
 
3. 4 mm 
12
12
4
4
p
mv mv
vv
?
?
 
1
K 
2
K 
22
1 1 2 2
22
22
22
22
12
11
4
22
11
(4 ) 4
22
11
16 4
22
: 4 :1
K mv K mv
m v mv
mv mv
KK
??
??
? ? ? ?
??
? ? ? ?
? ? ? ?
?
 
(2) 
 
4. (2) 
 
 
 Real inverted diminished 
 
 
 
 
5. (2) 
(A) ? correct 
(R) ? correct 
? angle of incidence ? critical angle for TIR 
 
6. 
11
11 12
22
6.67 10 2 16
13 34 10
4
mm
F G N
R
?
?
? ? ?
? ? ? ? ? 
(2) 
 
7. (1) 
 
8. (1) 
 
 
F C
 
KARNATAKA NTSE - STAGE 1 (2017) 
         
 
 
 
9. (A) ? correct 
(B) ? correct Pressure proportional to density at constant temp 
(1) 
 
10. 
2
E mc ? ? ? 
? ? ? ?
2
68
10
1 10 3 10
9 10 J
?
? ? ? ?
??
 
(4) 
 
11. According to Ste fe n ’s law 
Radiation power ?T
4
 
? On increasing the temperature by two time radiation power will increase by ? ?
4
2 16 ? 
times. 
(3) 
 
12. In a half positive wave of input AC single upper diode will conduct and in next negative 
wave lower diode will conduct & it is called full wave rectifier. 
(2) 
 
13. 
1
11
Reg
3 3 3
?
??
??
??
?
??
 
1
11
63
?
??
??
??
??
 
2 ?? 
(4) 
 
  
Page 3


 
KARNATAKA NTSE - STAGE 1 (2017) 
         
 
 
ANSWER KEY & SOLUTIONS 
PHYSICS 
 
1. A ( 2) 2.A ? ? ? ? 
Magnitude doubles & direction becomes opposite. 
(2) 
 
2. Area under v - t graph ? change in displacement of the practical 
(3) 
 
3. 4 mm 
12
12
4
4
p
mv mv
vv
?
?
 
1
K 
2
K 
22
1 1 2 2
22
22
22
22
12
11
4
22
11
(4 ) 4
22
11
16 4
22
: 4 :1
K mv K mv
m v mv
mv mv
KK
??
??
? ? ? ?
??
? ? ? ?
? ? ? ?
?
 
(2) 
 
4. (2) 
 
 
 Real inverted diminished 
 
 
 
 
5. (2) 
(A) ? correct 
(R) ? correct 
? angle of incidence ? critical angle for TIR 
 
6. 
11
11 12
22
6.67 10 2 16
13 34 10
4
mm
F G N
R
?
?
? ? ?
? ? ? ? ? 
(2) 
 
7. (1) 
 
8. (1) 
 
 
F C
 
KARNATAKA NTSE - STAGE 1 (2017) 
         
 
 
 
9. (A) ? correct 
(B) ? correct Pressure proportional to density at constant temp 
(1) 
 
10. 
2
E mc ? ? ? 
? ? ? ?
2
68
10
1 10 3 10
9 10 J
?
? ? ? ?
??
 
(4) 
 
11. According to Ste fe n ’s law 
Radiation power ?T
4
 
? On increasing the temperature by two time radiation power will increase by ? ?
4
2 16 ? 
times. 
(3) 
 
12. In a half positive wave of input AC single upper diode will conduct and in next negative 
wave lower diode will conduct & it is called full wave rectifier. 
(2) 
 
13. 
1
11
Reg
3 3 3
?
??
??
??
?
??
 
1
11
63
?
??
??
??
??
 
2 ?? 
(4) 
 
  
 
KARNATAKA NTSE - STAGE 1 (2017) 
         
 
 
ANSWER KEY & SOLUTIONS 
CHEMISTRY 
 
14. (3) 
Fact 
 
15. (1) 
Reason: Across the period size decreases, down the group size increases. 
 
16. (4) 
Reason: Methane and Propane do not exhibit isomerism 
 
17. (2) 
Reason: Indicator will have less wavelength in basic medium (R > Q > P) 
 
18. (4) 
Reason: Method of preparation of silicon. 
 
19. (2) 
Reason: 
2 2 2
Ca 2H O Ca(OH) H ? ? ? ? ? 
(base) 
? 
Shows pink colour in phenolphthalein 
 
20. (3) 
 
Reason: a. Mg + CuO ? ? ? MgO + Cu 
 
Reduction 
 
b. Oxygen is displaced. 
 
21. (2) 
Reason: Chemical ‘A ’ cannot be alcohol it can ’t turn blue litmus to red. Chemical ‘B ’ is 
an acid. 
 
22. (1) 
Reason: 
3 2 2 3
Pb(NO ) 2KI PbI 2KNO (aq) ? ? ? ? ? ? (yellow ppt). 
 
23. (4) 
Reason: 
2
1
(neutral)
2
C O CO ? ? ? ? 
22
(acidic) C O CO ? ? ? ? 
 
 
 
 
 
Page 4


 
KARNATAKA NTSE - STAGE 1 (2017) 
         
 
 
ANSWER KEY & SOLUTIONS 
PHYSICS 
 
1. A ( 2) 2.A ? ? ? ? 
Magnitude doubles & direction becomes opposite. 
(2) 
 
2. Area under v - t graph ? change in displacement of the practical 
(3) 
 
3. 4 mm 
12
12
4
4
p
mv mv
vv
?
?
 
1
K 
2
K 
22
1 1 2 2
22
22
22
22
12
11
4
22
11
(4 ) 4
22
11
16 4
22
: 4 :1
K mv K mv
m v mv
mv mv
KK
??
??
? ? ? ?
??
? ? ? ?
? ? ? ?
?
 
(2) 
 
4. (2) 
 
 
 Real inverted diminished 
 
 
 
 
5. (2) 
(A) ? correct 
(R) ? correct 
? angle of incidence ? critical angle for TIR 
 
6. 
11
11 12
22
6.67 10 2 16
13 34 10
4
mm
F G N
R
?
?
? ? ?
? ? ? ? ? 
(2) 
 
7. (1) 
 
8. (1) 
 
 
F C
 
KARNATAKA NTSE - STAGE 1 (2017) 
         
 
 
 
9. (A) ? correct 
(B) ? correct Pressure proportional to density at constant temp 
(1) 
 
10. 
2
E mc ? ? ? 
? ? ? ?
2
68
10
1 10 3 10
9 10 J
?
? ? ? ?
??
 
(4) 
 
11. According to Ste fe n ’s law 
Radiation power ?T
4
 
? On increasing the temperature by two time radiation power will increase by ? ?
4
2 16 ? 
times. 
(3) 
 
12. In a half positive wave of input AC single upper diode will conduct and in next negative 
wave lower diode will conduct & it is called full wave rectifier. 
(2) 
 
13. 
1
11
Reg
3 3 3
?
??
??
??
?
??
 
1
11
63
?
??
??
??
??
 
2 ?? 
(4) 
 
  
 
KARNATAKA NTSE - STAGE 1 (2017) 
         
 
 
ANSWER KEY & SOLUTIONS 
CHEMISTRY 
 
14. (3) 
Fact 
 
15. (1) 
Reason: Across the period size decreases, down the group size increases. 
 
16. (4) 
Reason: Methane and Propane do not exhibit isomerism 
 
17. (2) 
Reason: Indicator will have less wavelength in basic medium (R > Q > P) 
 
18. (4) 
Reason: Method of preparation of silicon. 
 
19. (2) 
Reason: 
2 2 2
Ca 2H O Ca(OH) H ? ? ? ? ? 
(base) 
? 
Shows pink colour in phenolphthalein 
 
20. (3) 
 
Reason: a. Mg + CuO ? ? ? MgO + Cu 
 
Reduction 
 
b. Oxygen is displaced. 
 
21. (2) 
Reason: Chemical ‘A ’ cannot be alcohol it can ’t turn blue litmus to red. Chemical ‘B ’ is 
an acid. 
 
22. (1) 
Reason: 
3 2 2 3
Pb(NO ) 2KI PbI 2KNO (aq) ? ? ? ? ? ? (yellow ppt). 
 
23. (4) 
Reason: 
2
1
(neutral)
2
C O CO ? ? ? ? 
22
(acidic) C O CO ? ? ? ? 
 
 
 
 
 
 
KARNATAKA NTSE - STAGE 1 (2017) 
         
 
 
 
24. (2) 
Reason: X is most electropositive 
Y is most electronegative 
So, type of bond formed is ionic. 
 
25. (3) 
Reason: Methan has negative M.Pt & B.Pt. 
Ethanoic acid has positive M.Pt & B.Pt. 
 
26. (4) 
(Fact) 
 
  
Page 5


 
KARNATAKA NTSE - STAGE 1 (2017) 
         
 
 
ANSWER KEY & SOLUTIONS 
PHYSICS 
 
1. A ( 2) 2.A ? ? ? ? 
Magnitude doubles & direction becomes opposite. 
(2) 
 
2. Area under v - t graph ? change in displacement of the practical 
(3) 
 
3. 4 mm 
12
12
4
4
p
mv mv
vv
?
?
 
1
K 
2
K 
22
1 1 2 2
22
22
22
22
12
11
4
22
11
(4 ) 4
22
11
16 4
22
: 4 :1
K mv K mv
m v mv
mv mv
KK
??
??
? ? ? ?
??
? ? ? ?
? ? ? ?
?
 
(2) 
 
4. (2) 
 
 
 Real inverted diminished 
 
 
 
 
5. (2) 
(A) ? correct 
(R) ? correct 
? angle of incidence ? critical angle for TIR 
 
6. 
11
11 12
22
6.67 10 2 16
13 34 10
4
mm
F G N
R
?
?
? ? ?
? ? ? ? ? 
(2) 
 
7. (1) 
 
8. (1) 
 
 
F C
 
KARNATAKA NTSE - STAGE 1 (2017) 
         
 
 
 
9. (A) ? correct 
(B) ? correct Pressure proportional to density at constant temp 
(1) 
 
10. 
2
E mc ? ? ? 
? ? ? ?
2
68
10
1 10 3 10
9 10 J
?
? ? ? ?
??
 
(4) 
 
11. According to Ste fe n ’s law 
Radiation power ?T
4
 
? On increasing the temperature by two time radiation power will increase by ? ?
4
2 16 ? 
times. 
(3) 
 
12. In a half positive wave of input AC single upper diode will conduct and in next negative 
wave lower diode will conduct & it is called full wave rectifier. 
(2) 
 
13. 
1
11
Reg
3 3 3
?
??
??
??
?
??
 
1
11
63
?
??
??
??
??
 
2 ?? 
(4) 
 
  
 
KARNATAKA NTSE - STAGE 1 (2017) 
         
 
 
ANSWER KEY & SOLUTIONS 
CHEMISTRY 
 
14. (3) 
Fact 
 
15. (1) 
Reason: Across the period size decreases, down the group size increases. 
 
16. (4) 
Reason: Methane and Propane do not exhibit isomerism 
 
17. (2) 
Reason: Indicator will have less wavelength in basic medium (R > Q > P) 
 
18. (4) 
Reason: Method of preparation of silicon. 
 
19. (2) 
Reason: 
2 2 2
Ca 2H O Ca(OH) H ? ? ? ? ? 
(base) 
? 
Shows pink colour in phenolphthalein 
 
20. (3) 
 
Reason: a. Mg + CuO ? ? ? MgO + Cu 
 
Reduction 
 
b. Oxygen is displaced. 
 
21. (2) 
Reason: Chemical ‘A ’ cannot be alcohol it can ’t turn blue litmus to red. Chemical ‘B ’ is 
an acid. 
 
22. (1) 
Reason: 
3 2 2 3
Pb(NO ) 2KI PbI 2KNO (aq) ? ? ? ? ? ? (yellow ppt). 
 
23. (4) 
Reason: 
2
1
(neutral)
2
C O CO ? ? ? ? 
22
(acidic) C O CO ? ? ? ? 
 
 
 
 
 
 
KARNATAKA NTSE - STAGE 1 (2017) 
         
 
 
 
24. (2) 
Reason: X is most electropositive 
Y is most electronegative 
So, type of bond formed is ionic. 
 
25. (3) 
Reason: Methan has negative M.Pt & B.Pt. 
Ethanoic acid has positive M.Pt & B.Pt. 
 
26. (4) 
(Fact) 
 
  
 
KARNATAKA NTSE - STAGE 1 (2017) 
         
 
 
ANSWER KEY 
BIOLOGY 
 
27. (3) 
 
28. (4) 
 
29. (2) 
 
30. (3) 
 
31. (1) 
 
32. (3) 
 
33. (3) 
 
34. (2) 
 
35. (1) 
 
36. (1) 
 
37. (2) 
 
38. (4) 
 
39. (3) 
 
40. (1) 
 
  
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