Andhra Pradesh: State Level Answer Key (SAT) - 2020-21 | NTSE for Class 10 PDF Download

 Page 1


 
 
 
NTSE FEBRUARY, 2021 
STAGE -1(A.P) 
 
 
 
 
 
 
SCHOLASTIC APTITUDE TEST 
SOLUTIONS 
 
 
 
 
 
 
 
 
 
 
  
  
 
 
Page 2


 
 
 
NTSE FEBRUARY, 2021 
STAGE -1(A.P) 
 
 
 
 
 
 
SCHOLASTIC APTITUDE TEST 
SOLUTIONS 
 
 
 
 
 
 
 
 
 
 
  
  
 
 
        
 
    
NTSE-FEBRUARY, 2021 (STAGE – 1 – AP) 
SCHOLASTIC APTITUDE TEST 
QUESTION PAPER CODE: C 
Time : 2 Hrs         Max.marks: 100 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
INSTRUCTIONS 
Read the following instructions carefully before you answer the questions. Answers are to be SHADED on a 
SEPARATE OMR Answer Sheet given, with HB Pencil. Read the Instructions printed on the 
OMR Sheet carefully before answering the question. 
1.  Please write your Center Code Number and Roll Number very clearly (only one digit in one block) on the 
OMR Sheet as given in your admission card. Please see that no block is left unfilled and even zeros 
appearing in the Center Code Number are correctly transferred to the appropriate blocks on the OMR 
Sheet as shown in the example given in the OMR Sheet. For all the subsequent purpose your Center Code 
Number and Roll Number shall remain the same as given on the Admission Card. 
2.  Paper-II (Scholastic Aptitude test) consists of 100 questions (Q.Nos 1 to 100)  
3.  All questions carry one mark each.  
4.  Since all questions are compulsory do not try to read through the whole question paper before beginning to 
answer it. 
5.  Begin with the first question and keep trying one question after another till you finish all the questions 
6.  If you do not know the answer to any question, do not spend much time on it and pass on to next one. If 
time permits, you can come back to the questions which you have left in the first instance and try them 
again.  
7.  Since the time allotted to the question paper is very limited, you should make the best use of it by not 
spending too much time on any question. 
8.  A black page is provided for rough work at the end of question paper.  
9.  REMEMBER YOU HAVE TO SHADE ANSWERS ON A SEPARATE OMR SHEET PROVIDED. 
10.  Answer to each question is to be indicated by SHADING the circle having the number of the correct 
alternative in OMR Sheet from among the ones given for the corresponding question in the booklet.  
11.  Now turn to the next page and start answering the questions. 
12.  The OMR answer sheet consists of two copies, the ORIGINAL COPY and the CANDIDATE’S COPY. 
Do not separate or displace them. Do not darken the bubbles in two copies of OMR answer sheets 
separately. After the examination, you should hand over the OMR Sheet to the Invigilator of the room and 
can take away the candidate’s copy of OMR answer sheet with them. 
13.  The candidate need not return this Question Paper booklet and can take it after completion of the 
examination. No candidate should leave the examination hall before the end of the examination. 
Page 3


 
 
 
NTSE FEBRUARY, 2021 
STAGE -1(A.P) 
 
 
 
 
 
 
SCHOLASTIC APTITUDE TEST 
SOLUTIONS 
 
 
 
 
 
 
 
 
 
 
  
  
 
 
        
 
    
NTSE-FEBRUARY, 2021 (STAGE – 1 – AP) 
SCHOLASTIC APTITUDE TEST 
QUESTION PAPER CODE: C 
Time : 2 Hrs         Max.marks: 100 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
INSTRUCTIONS 
Read the following instructions carefully before you answer the questions. Answers are to be SHADED on a 
SEPARATE OMR Answer Sheet given, with HB Pencil. Read the Instructions printed on the 
OMR Sheet carefully before answering the question. 
1.  Please write your Center Code Number and Roll Number very clearly (only one digit in one block) on the 
OMR Sheet as given in your admission card. Please see that no block is left unfilled and even zeros 
appearing in the Center Code Number are correctly transferred to the appropriate blocks on the OMR 
Sheet as shown in the example given in the OMR Sheet. For all the subsequent purpose your Center Code 
Number and Roll Number shall remain the same as given on the Admission Card. 
2.  Paper-II (Scholastic Aptitude test) consists of 100 questions (Q.Nos 1 to 100)  
3.  All questions carry one mark each.  
4.  Since all questions are compulsory do not try to read through the whole question paper before beginning to 
answer it. 
5.  Begin with the first question and keep trying one question after another till you finish all the questions 
6.  If you do not know the answer to any question, do not spend much time on it and pass on to next one. If 
time permits, you can come back to the questions which you have left in the first instance and try them 
again.  
7.  Since the time allotted to the question paper is very limited, you should make the best use of it by not 
spending too much time on any question. 
8.  A black page is provided for rough work at the end of question paper.  
9.  REMEMBER YOU HAVE TO SHADE ANSWERS ON A SEPARATE OMR SHEET PROVIDED. 
10.  Answer to each question is to be indicated by SHADING the circle having the number of the correct 
alternative in OMR Sheet from among the ones given for the corresponding question in the booklet.  
11.  Now turn to the next page and start answering the questions. 
12.  The OMR answer sheet consists of two copies, the ORIGINAL COPY and the CANDIDATE’S COPY. 
Do not separate or displace them. Do not darken the bubbles in two copies of OMR answer sheets 
separately. After the examination, you should hand over the OMR Sheet to the Invigilator of the room and 
can take away the candidate’s copy of OMR answer sheet with them. 
13.  The candidate need not return this Question Paper booklet and can take it after completion of the 
examination. No candidate should leave the examination hall before the end of the examination. 
        
 
    
 
PAPER - I 
SCHOLASTIC APTITUDE TEST 
(Q.Nos. 1 to 100) 
Max. marks : 100 
 
 
Note:  
 
(i) Subjects, Total questions of each subject and marks allotted: 
 1)  Physics   13 questions  13 marks 
2)  Chemistry   13 questions  13 marks 
3)  Biology   14 questions  14 marks 
4)  Mathematics  20 questions  20 marks 
5)  History   12 questions  12 marks 
6)  Geography   12 questions  12 marks 
7)  Political Science  08 questions  08 marks 
8)  Economics   08 questions  08 marks 
 
 
(ii)  SHADE the correct alternatives in the OMR Answer Sheet 
provided, from amongst the ones given against the 
corresponding question in the Question Booklet. For shading 
the circles, use HB Pencil. 
 
Page 4


 
 
 
NTSE FEBRUARY, 2021 
STAGE -1(A.P) 
 
 
 
 
 
 
SCHOLASTIC APTITUDE TEST 
SOLUTIONS 
 
 
 
 
 
 
 
 
 
 
  
  
 
 
        
 
    
NTSE-FEBRUARY, 2021 (STAGE – 1 – AP) 
SCHOLASTIC APTITUDE TEST 
QUESTION PAPER CODE: C 
Time : 2 Hrs         Max.marks: 100 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
INSTRUCTIONS 
Read the following instructions carefully before you answer the questions. Answers are to be SHADED on a 
SEPARATE OMR Answer Sheet given, with HB Pencil. Read the Instructions printed on the 
OMR Sheet carefully before answering the question. 
1.  Please write your Center Code Number and Roll Number very clearly (only one digit in one block) on the 
OMR Sheet as given in your admission card. Please see that no block is left unfilled and even zeros 
appearing in the Center Code Number are correctly transferred to the appropriate blocks on the OMR 
Sheet as shown in the example given in the OMR Sheet. For all the subsequent purpose your Center Code 
Number and Roll Number shall remain the same as given on the Admission Card. 
2.  Paper-II (Scholastic Aptitude test) consists of 100 questions (Q.Nos 1 to 100)  
3.  All questions carry one mark each.  
4.  Since all questions are compulsory do not try to read through the whole question paper before beginning to 
answer it. 
5.  Begin with the first question and keep trying one question after another till you finish all the questions 
6.  If you do not know the answer to any question, do not spend much time on it and pass on to next one. If 
time permits, you can come back to the questions which you have left in the first instance and try them 
again.  
7.  Since the time allotted to the question paper is very limited, you should make the best use of it by not 
spending too much time on any question. 
8.  A black page is provided for rough work at the end of question paper.  
9.  REMEMBER YOU HAVE TO SHADE ANSWERS ON A SEPARATE OMR SHEET PROVIDED. 
10.  Answer to each question is to be indicated by SHADING the circle having the number of the correct 
alternative in OMR Sheet from among the ones given for the corresponding question in the booklet.  
11.  Now turn to the next page and start answering the questions. 
12.  The OMR answer sheet consists of two copies, the ORIGINAL COPY and the CANDIDATE’S COPY. 
Do not separate or displace them. Do not darken the bubbles in two copies of OMR answer sheets 
separately. After the examination, you should hand over the OMR Sheet to the Invigilator of the room and 
can take away the candidate’s copy of OMR answer sheet with them. 
13.  The candidate need not return this Question Paper booklet and can take it after completion of the 
examination. No candidate should leave the examination hall before the end of the examination. 
        
 
    
 
PAPER - I 
SCHOLASTIC APTITUDE TEST 
(Q.Nos. 1 to 100) 
Max. marks : 100 
 
 
Note:  
 
(i) Subjects, Total questions of each subject and marks allotted: 
 1)  Physics   13 questions  13 marks 
2)  Chemistry   13 questions  13 marks 
3)  Biology   14 questions  14 marks 
4)  Mathematics  20 questions  20 marks 
5)  History   12 questions  12 marks 
6)  Geography   12 questions  12 marks 
7)  Political Science  08 questions  08 marks 
8)  Economics   08 questions  08 marks 
 
 
(ii)  SHADE the correct alternatives in the OMR Answer Sheet 
provided, from amongst the ones given against the 
corresponding question in the Question Booklet. For shading 
the circles, use HB Pencil. 
 
        
 
    
PHYSICS 
 
1.2 
Sol. As pressure increases boiling point increases 
2.3 
Sol. 
0
10
2
/
i
m i
V V
V V cm s
?
? ? 
3. 1 
Sol. Volume of bottle = 2 cm
3
 
 Mass of oil = 1.76 g 
 Density = 0.88 g/cm
3 
OR 
 .
density of oil
R D
density of water
? 
 
? ?
? ?
/
/
mass of oil volume
mass of water volume
? 
 
3
1 76
0 88
2
.
. / g cm ? ? 
4.2 
Sol. 
2
3000 3000
90 000
2 2 50
,
P
KE J
m
?
? ? ?
?
 
5.2 
Sol. 
1 1
2
0 5 .
Power D
near point
? ? ? 
6.1 
Sol. Ice does not melt completely. Equilibrium temperature is 0
0
C 
7.2 
Sol. ? is more for kerosene than water, density of water is more than kerosene 
8.3 
Sol. (i), (ii) converging lens 
 (iii) diverging lens 
9.2 
Sol. Focal length is –ve, concave lens is used Myopia, near sightedness the ability to see 
close objects more clearly than distant objects. 
Page 5


 
 
 
NTSE FEBRUARY, 2021 
STAGE -1(A.P) 
 
 
 
 
 
 
SCHOLASTIC APTITUDE TEST 
SOLUTIONS 
 
 
 
 
 
 
 
 
 
 
  
  
 
 
        
 
    
NTSE-FEBRUARY, 2021 (STAGE – 1 – AP) 
SCHOLASTIC APTITUDE TEST 
QUESTION PAPER CODE: C 
Time : 2 Hrs         Max.marks: 100 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
INSTRUCTIONS 
Read the following instructions carefully before you answer the questions. Answers are to be SHADED on a 
SEPARATE OMR Answer Sheet given, with HB Pencil. Read the Instructions printed on the 
OMR Sheet carefully before answering the question. 
1.  Please write your Center Code Number and Roll Number very clearly (only one digit in one block) on the 
OMR Sheet as given in your admission card. Please see that no block is left unfilled and even zeros 
appearing in the Center Code Number are correctly transferred to the appropriate blocks on the OMR 
Sheet as shown in the example given in the OMR Sheet. For all the subsequent purpose your Center Code 
Number and Roll Number shall remain the same as given on the Admission Card. 
2.  Paper-II (Scholastic Aptitude test) consists of 100 questions (Q.Nos 1 to 100)  
3.  All questions carry one mark each.  
4.  Since all questions are compulsory do not try to read through the whole question paper before beginning to 
answer it. 
5.  Begin with the first question and keep trying one question after another till you finish all the questions 
6.  If you do not know the answer to any question, do not spend much time on it and pass on to next one. If 
time permits, you can come back to the questions which you have left in the first instance and try them 
again.  
7.  Since the time allotted to the question paper is very limited, you should make the best use of it by not 
spending too much time on any question. 
8.  A black page is provided for rough work at the end of question paper.  
9.  REMEMBER YOU HAVE TO SHADE ANSWERS ON A SEPARATE OMR SHEET PROVIDED. 
10.  Answer to each question is to be indicated by SHADING the circle having the number of the correct 
alternative in OMR Sheet from among the ones given for the corresponding question in the booklet.  
11.  Now turn to the next page and start answering the questions. 
12.  The OMR answer sheet consists of two copies, the ORIGINAL COPY and the CANDIDATE’S COPY. 
Do not separate or displace them. Do not darken the bubbles in two copies of OMR answer sheets 
separately. After the examination, you should hand over the OMR Sheet to the Invigilator of the room and 
can take away the candidate’s copy of OMR answer sheet with them. 
13.  The candidate need not return this Question Paper booklet and can take it after completion of the 
examination. No candidate should leave the examination hall before the end of the examination. 
        
 
    
 
PAPER - I 
SCHOLASTIC APTITUDE TEST 
(Q.Nos. 1 to 100) 
Max. marks : 100 
 
 
Note:  
 
(i) Subjects, Total questions of each subject and marks allotted: 
 1)  Physics   13 questions  13 marks 
2)  Chemistry   13 questions  13 marks 
3)  Biology   14 questions  14 marks 
4)  Mathematics  20 questions  20 marks 
5)  History   12 questions  12 marks 
6)  Geography   12 questions  12 marks 
7)  Political Science  08 questions  08 marks 
8)  Economics   08 questions  08 marks 
 
 
(ii)  SHADE the correct alternatives in the OMR Answer Sheet 
provided, from amongst the ones given against the 
corresponding question in the Question Booklet. For shading 
the circles, use HB Pencil. 
 
        
 
    
PHYSICS 
 
1.2 
Sol. As pressure increases boiling point increases 
2.3 
Sol. 
0
10
2
/
i
m i
V V
V V cm s
?
? ? 
3. 1 
Sol. Volume of bottle = 2 cm
3
 
 Mass of oil = 1.76 g 
 Density = 0.88 g/cm
3 
OR 
 .
density of oil
R D
density of water
? 
 
? ?
? ?
/
/
mass of oil volume
mass of water volume
? 
 
3
1 76
0 88
2
.
. / g cm ? ? 
4.2 
Sol. 
2
3000 3000
90 000
2 2 50
,
P
KE J
m
?
? ? ?
?
 
5.2 
Sol. 
1 1
2
0 5 .
Power D
near point
? ? ? 
6.1 
Sol. Ice does not melt completely. Equilibrium temperature is 0
0
C 
7.2 
Sol. ? is more for kerosene than water, density of water is more than kerosene 
8.3 
Sol. (i), (ii) converging lens 
 (iii) diverging lens 
9.2 
Sol. Focal length is –ve, concave lens is used Myopia, near sightedness the ability to see 
close objects more clearly than distant objects. 
        
 
    
10.2 
Sol. 
2 1
1 2
m m
a g
m m
? ? ?
?
? ?
?
? ?
 
 
12 8
5
20
/ a g g
? ? ?
? ?
? ?
? ?
 
11.4 
Sol. 
5
72 20
18
/ V m s ? ? ? 
 
? ?
2 2
1
1000
2
. , F S m v u F N ? ? ? 
12.3 
Sol. , P mV ? Momentum doubled 
13.3 
Sol. ? ? N m g a ? ? 
 75 12 900 N ? ? ?