Class 10 Exam > Class 10 Notes > Science Class 10 > CBSE Science Past Year Paper with Solutions - 2025 (Set - 3)
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Page 1
*31/3/1* 1 # [ P.T.O. ]
*ECNEICS*
??????????? ????? ? -???? ??? ?? ????? -???? ???? ? ?
???-????? ?? ???? ? ?? ? ??? ?
Candidates must write the Q.P. Code
on the title page of the answer-book.
Series : 3EGFH
SET~1
????? ? -???? ???
Q.P. Code
??? ?
?.
Roll No.
???
NOTE
(I) ? ? ??? ?? ??? ?? ? ?? ?? ? ?? ????? ? -???? ??? ???? ?? ?????
27 ??? ?
(I) Please check that this question paper
contains 27 printed pages.
(II) ????? ? -???? ??? ??????? ????? ?? ?? ???? ??
????? ? -???? ??? ?? ??????????? ????? -???? ???? ? ?
???-????? ?? ?????? ?
(II)
Q.P. Code given on the right hand
side of the question paper should be
written on the title page of the
answer-book by the candidate.
(III) ? ? ??? ????? ?? ??? ??? ?? ????? ? -???? ??? 39 ????? ?
??? ?
(III) Please check that this question paper
contains 39 questions.
(IV) ? ? ??? ????? ? ?? ???? ? ????? ???? ???? ??
????, ????? -????? ?? ??? ??? ???? ?? ????? ?
?? ??? ??
??? ???? ? ????? ?
(IV)
Please write down the Serial
Number of the question in the
answer-book at the given place
before attempting it.
(V) ?? ????? ? -???? ?? ????? ? ? ???? 15 ????? ??
??? ????? ??? ?? ? ????? ? -???? ?? ?? ???? ???? ????
??? 10.15 ??? ????? ????? ? 10.15 ??? ??
10.30 ??? ?? ??????????? ? ? ?? ????? ? -???? ??
??????? ?? ?? ????? ? ? ????? ?? ????? -???? ????
?? ??? ????? ???? ???????? ?
(V)
15 minute time has been allotted to
read this question paper. The
question paper will be distributed
at 10.15 a.m. From 10.15 a.m. to
10.30 a.m., the candidates will
read the question paper only and
will not write any answer on the
answer-book during this period.
???????
SCIENCE
????????? ??? : 3 ????? ???? ??? ?
?? : 80
Time allowed : 3 hours Maximum Marks : 80
31/3/1
#
Page 2
*31/3/1* 1 # [ P.T.O. ]
*ECNEICS*
??????????? ????? ? -???? ??? ?? ????? -???? ???? ? ?
???-????? ?? ???? ? ?? ? ??? ?
Candidates must write the Q.P. Code
on the title page of the answer-book.
Series : 3EGFH
SET~1
????? ? -???? ???
Q.P. Code
??? ?
?.
Roll No.
???
NOTE
(I) ? ? ??? ?? ??? ?? ? ?? ?? ? ?? ????? ? -???? ??? ???? ?? ?????
27 ??? ?
(I) Please check that this question paper
contains 27 printed pages.
(II) ????? ? -???? ??? ??????? ????? ?? ?? ???? ??
????? ? -???? ??? ?? ??????????? ????? -???? ???? ? ?
???-????? ?? ?????? ?
(II)
Q.P. Code given on the right hand
side of the question paper should be
written on the title page of the
answer-book by the candidate.
(III) ? ? ??? ????? ?? ??? ??? ?? ????? ? -???? ??? 39 ????? ?
??? ?
(III) Please check that this question paper
contains 39 questions.
(IV) ? ? ??? ????? ? ?? ???? ? ????? ???? ???? ??
????, ????? -????? ?? ??? ??? ???? ?? ????? ?
?? ??? ??
??? ???? ? ????? ?
(IV)
Please write down the Serial
Number of the question in the
answer-book at the given place
before attempting it.
(V) ?? ????? ? -???? ?? ????? ? ? ???? 15 ????? ??
??? ????? ??? ?? ? ????? ? -???? ?? ?? ???? ???? ????
??? 10.15 ??? ????? ????? ? 10.15 ??? ??
10.30 ??? ?? ??????????? ? ? ?? ????? ? -???? ??
??????? ?? ?? ????? ? ? ????? ?? ????? -???? ????
?? ??? ????? ???? ???????? ?
(V)
15 minute time has been allotted to
read this question paper. The
question paper will be distributed
at 10.15 a.m. From 10.15 a.m. to
10.30 a.m., the candidates will
read the question paper only and
will not write any answer on the
answer-book during this period.
???????
SCIENCE
????????? ??? : 3 ????? ???? ??? ?
?? : 80
Time allowed : 3 hours Maximum Marks : 80
31/3/1
#
*31/3/1* 2 #
*ECNEICS*
???????? ?? ?????? ?:
?? ?? ?? ? ? ?? ??????? ?? ???? ????? ??? ?? ???? ? ?? ???? ???? ?? ?? ?? ? ????? :
(i) ?? ????? ? -???? ??? ?? 39 ????? ? ??? ? ????????? ? ?? ???? ??? ?
(ii) ?? ????? ?-???? ????? ?? ??? ??? ?? ????? ???? ??? ?? – ?,??,??,?? ??
? ? ?
(iii) ????? ?? – ????? ? ?
??? ?? 1??? 20 ?? ????? ??? ??? ?????? ?? ????? ? ??? ? ???????? ????? ? 1 ?
?? ?? ?? ?
(iv) ????? ?? – ????? ? ?
??? ?? 21??? 26 ?? ??? ??-??????? ?????? ?? ????? ? ??? ? ???????? ????? ? 2 ?
???? ??
?? ? ?? ????? ??? ?? ????? 30 ?? 50 ???????? ??? ????? ???? ????? ?
(v) ????? ?? – ????? ? ?
??? ?? 27 ?? 33 ?? ??-??????? ?????? ?? ????? ? ??? ? ????? ?? ? ????? ? 3 ?
???? ?? ?? ? ??
????? ??? ?? ????? 50 ?? 80 ??? ????? ??? ????? ???? ????? ?
(vi) ????? ?? – ????? ? ?
??? ?? 34 ?? 36 ?? ??????-??????? ?????? ?? ????? ? ??? ? ????? ?? ? ????? ? 5 ?
???? ?? ?? ?
?? ????? ??? ?? ????? 80 ?? 120 ??? ????? ??? ????? ???? ????? ?
(vii) ????? ?? – ????? ? ?
??? ?? 37 ?? 39 ?? 3 ????? -??????? /?????? -??? ???? ??????? ?? ???? ??
??? ??
4 ?
???? ?? ????? ? (??-????? ??? ????) ??? ?
(viii) ????? ? -???? ??? ????? ????? ? ???? ?????? ??? ?? ? ??????, ??? ????? ??? ?
????? ????? ? ????? ?? ??? ? ?? ??????
?? ????? ??? ??? ??? ?? ?? ?????? ?? ????? ??????? ?
???? ? $
????? ? ?
??? ?? 1 ?? 20 ?? ?? ???????? ????? ? ??? ????? ?? ??? ????? ??? ??? ?? ???? ???? ????? ? ????? ??
? ? ? ? ?? ? ????? ?? ? ? ??? ??????? ?
??? ???? ?? ? 20 ?1=20
1. ????????????? ????????? ?????? ?? ?????? ?????? :
p Al + q H
2
O ? ? ? r Al
2
O
3
+ s H
2
?? ????????? ?????? ?? ?
????? ? ? ???? ? ? ?? ? ?, ‘p’, ‘q’, ‘r’ ?? ‘s’ ? ? ??? ?????: ???? ?????? :
(A) 3, 2, 2, 1 (B) 2, 3, 3, 1
(C) 2, 3, 1, 3 (D) 3, 1, 2, 2
2. ????? ? ??????? ??? ?? ???-?? ?? ?????? ? ??? ????? ? ? ?????? ?? ??????? ????? ??? ?? ?
(A) NaCl, Na
2
SO
4
, CaSO
4
(B) K
2
SO
4
, Na
2
SO
4
, CaSO
4
(C) NaNO
3
, CaCO
3
, Na
2
CO
3
(D) MgSO
4
, CuSO
4
, MgCl
2
Page 3
*31/3/1* 1 # [ P.T.O. ]
*ECNEICS*
??????????? ????? ? -???? ??? ?? ????? -???? ???? ? ?
???-????? ?? ???? ? ?? ? ??? ?
Candidates must write the Q.P. Code
on the title page of the answer-book.
Series : 3EGFH
SET~1
????? ? -???? ???
Q.P. Code
??? ?
?.
Roll No.
???
NOTE
(I) ? ? ??? ?? ??? ?? ? ?? ?? ? ?? ????? ? -???? ??? ???? ?? ?????
27 ??? ?
(I) Please check that this question paper
contains 27 printed pages.
(II) ????? ? -???? ??? ??????? ????? ?? ?? ???? ??
????? ? -???? ??? ?? ??????????? ????? -???? ???? ? ?
???-????? ?? ?????? ?
(II)
Q.P. Code given on the right hand
side of the question paper should be
written on the title page of the
answer-book by the candidate.
(III) ? ? ??? ????? ?? ??? ??? ?? ????? ? -???? ??? 39 ????? ?
??? ?
(III) Please check that this question paper
contains 39 questions.
(IV) ? ? ??? ????? ? ?? ???? ? ????? ???? ???? ??
????, ????? -????? ?? ??? ??? ???? ?? ????? ?
?? ??? ??
??? ???? ? ????? ?
(IV)
Please write down the Serial
Number of the question in the
answer-book at the given place
before attempting it.
(V) ?? ????? ? -???? ?? ????? ? ? ???? 15 ????? ??
??? ????? ??? ?? ? ????? ? -???? ?? ?? ???? ???? ????
??? 10.15 ??? ????? ????? ? 10.15 ??? ??
10.30 ??? ?? ??????????? ? ? ?? ????? ? -???? ??
??????? ?? ?? ????? ? ? ????? ?? ????? -???? ????
?? ??? ????? ???? ???????? ?
(V)
15 minute time has been allotted to
read this question paper. The
question paper will be distributed
at 10.15 a.m. From 10.15 a.m. to
10.30 a.m., the candidates will
read the question paper only and
will not write any answer on the
answer-book during this period.
???????
SCIENCE
????????? ??? : 3 ????? ???? ??? ?
?? : 80
Time allowed : 3 hours Maximum Marks : 80
31/3/1
#
*31/3/1* 2 #
*ECNEICS*
???????? ?? ?????? ?:
?? ?? ?? ? ? ?? ??????? ?? ???? ????? ??? ?? ???? ? ?? ???? ???? ?? ?? ?? ? ????? :
(i) ?? ????? ? -???? ??? ?? 39 ????? ? ??? ? ????????? ? ?? ???? ??? ?
(ii) ?? ????? ?-???? ????? ?? ??? ??? ?? ????? ???? ??? ?? – ?,??,??,?? ??
? ? ?
(iii) ????? ?? – ????? ? ?
??? ?? 1??? 20 ?? ????? ??? ??? ?????? ?? ????? ? ??? ? ???????? ????? ? 1 ?
?? ?? ?? ?
(iv) ????? ?? – ????? ? ?
??? ?? 21??? 26 ?? ??? ??-??????? ?????? ?? ????? ? ??? ? ???????? ????? ? 2 ?
???? ??
?? ? ?? ????? ??? ?? ????? 30 ?? 50 ???????? ??? ????? ???? ????? ?
(v) ????? ?? – ????? ? ?
??? ?? 27 ?? 33 ?? ??-??????? ?????? ?? ????? ? ??? ? ????? ?? ? ????? ? 3 ?
???? ?? ?? ? ??
????? ??? ?? ????? 50 ?? 80 ??? ????? ??? ????? ???? ????? ?
(vi) ????? ?? – ????? ? ?
??? ?? 34 ?? 36 ?? ??????-??????? ?????? ?? ????? ? ??? ? ????? ?? ? ????? ? 5 ?
???? ?? ?? ?
?? ????? ??? ?? ????? 80 ?? 120 ??? ????? ??? ????? ???? ????? ?
(vii) ????? ?? – ????? ? ?
??? ?? 37 ?? 39 ?? 3 ????? -??????? /?????? -??? ???? ??????? ?? ???? ??
??? ??
4 ?
???? ?? ????? ? (??-????? ??? ????) ??? ?
(viii) ????? ? -???? ??? ????? ????? ? ???? ?????? ??? ?? ? ??????, ??? ????? ??? ?
????? ????? ? ????? ?? ??? ? ?? ??????
?? ????? ??? ??? ??? ?? ?? ?????? ?? ????? ??????? ?
???? ? $
????? ? ?
??? ?? 1 ?? 20 ?? ?? ???????? ????? ? ??? ????? ?? ??? ????? ??? ??? ?? ???? ???? ????? ? ????? ??
? ? ? ? ?? ? ????? ?? ? ? ??? ??????? ?
??? ???? ?? ? 20 ?1=20
1. ????????????? ????????? ?????? ?? ?????? ?????? :
p Al + q H
2
O ? ? ? r Al
2
O
3
+ s H
2
?? ????????? ?????? ?? ?
????? ? ? ???? ? ? ?? ? ?, ‘p’, ‘q’, ‘r’ ?? ‘s’ ? ? ??? ?????: ???? ?????? :
(A) 3, 2, 2, 1 (B) 2, 3, 3, 1
(C) 2, 3, 1, 3 (D) 3, 1, 2, 2
2. ????? ? ??????? ??? ?? ???-?? ?? ?????? ? ??? ????? ? ? ?????? ?? ??????? ????? ??? ?? ?
(A) NaCl, Na
2
SO
4
, CaSO
4
(B) K
2
SO
4
, Na
2
SO
4
, CaSO
4
(C) NaNO
3
, CaCO
3
, Na
2
CO
3
(D) MgSO
4
, CuSO
4
, MgCl
2
*31/3/1* 3 # [ P.T.O. ]
*ECNEICS*
General Instructions :
Read the following instructions very carefully and strictly follow them :
(i) This question paper comprises 39 questions. All questions are compulsory.
(ii) This question paper is divided into five sections – A, B, C, D and E.
(iii) Section A – Questions No. 1 to 20 are Multiple Choice Questions. Each
question carries 1 mark.
(iv) Section B – Questions No. 21 to 26 are Very Short Answer type questions.
Each question carries 2 marks. Answer to these questions should be in the
range of 30 to 50 words.
(v) Section C – Questions No. 27 to 33 are Short Answer type questions. Each
question carries 3 marks. Answer to these questions should in the range of
50 to 80 words.
(vi) Section D – Questions No. 34 to 36 are Long Answer type questions. Each
question carries 5 marks. Answer to these questions should be in the range of
80 to 120 words.
(vii) Section E – Questions No. 37 to 39 are of 3 source-based/case-based units of
assessment carrying 4 marks each with sub-parts.
(viii) There is no overall choice. However, an internal choice has been provided in
some sections. Only one of the alternatives has to be attempted in such
questions.
SECTION A
Select and write the most appropriate option out of the four options given for
each of the questions no. 1 to 20. There is no negative marking for incorrect
response. 20 ?1=20
1. Consider the following chemical equation :
p Al + q H
2
O ? ? ? r Al
2
O
3
+ s H
2
To balance this chemical equation, the values of ‘p’, ‘q’, ‘r’ and ‘s’ must be
respectively :
(A) 3, 2, 2, 1 (B) 2, 3, 3, 1
(C) 2, 3, 1, 3 (D) 3, 1, 2, 2
2. Which of the given option represents a family of salts ?
(A) NaCl, Na
2
SO
4
, CaSO
4
(B) K
2
SO
4
, Na
2
SO
4
, CaSO
4
(C) NaNO
3
, CaCO
3
, Na
2
CO
3
(D) MgSO
4
, CuSO
4
, MgCl
2
Page 4
*31/3/1* 1 # [ P.T.O. ]
*ECNEICS*
??????????? ????? ? -???? ??? ?? ????? -???? ???? ? ?
???-????? ?? ???? ? ?? ? ??? ?
Candidates must write the Q.P. Code
on the title page of the answer-book.
Series : 3EGFH
SET~1
????? ? -???? ???
Q.P. Code
??? ?
?.
Roll No.
???
NOTE
(I) ? ? ??? ?? ??? ?? ? ?? ?? ? ?? ????? ? -???? ??? ???? ?? ?????
27 ??? ?
(I) Please check that this question paper
contains 27 printed pages.
(II) ????? ? -???? ??? ??????? ????? ?? ?? ???? ??
????? ? -???? ??? ?? ??????????? ????? -???? ???? ? ?
???-????? ?? ?????? ?
(II)
Q.P. Code given on the right hand
side of the question paper should be
written on the title page of the
answer-book by the candidate.
(III) ? ? ??? ????? ?? ??? ??? ?? ????? ? -???? ??? 39 ????? ?
??? ?
(III) Please check that this question paper
contains 39 questions.
(IV) ? ? ??? ????? ? ?? ???? ? ????? ???? ???? ??
????, ????? -????? ?? ??? ??? ???? ?? ????? ?
?? ??? ??
??? ???? ? ????? ?
(IV)
Please write down the Serial
Number of the question in the
answer-book at the given place
before attempting it.
(V) ?? ????? ? -???? ?? ????? ? ? ???? 15 ????? ??
??? ????? ??? ?? ? ????? ? -???? ?? ?? ???? ???? ????
??? 10.15 ??? ????? ????? ? 10.15 ??? ??
10.30 ??? ?? ??????????? ? ? ?? ????? ? -???? ??
??????? ?? ?? ????? ? ? ????? ?? ????? -???? ????
?? ??? ????? ???? ???????? ?
(V)
15 minute time has been allotted to
read this question paper. The
question paper will be distributed
at 10.15 a.m. From 10.15 a.m. to
10.30 a.m., the candidates will
read the question paper only and
will not write any answer on the
answer-book during this period.
???????
SCIENCE
????????? ??? : 3 ????? ???? ??? ?
?? : 80
Time allowed : 3 hours Maximum Marks : 80
31/3/1
#
*31/3/1* 2 #
*ECNEICS*
???????? ?? ?????? ?:
?? ?? ?? ? ? ?? ??????? ?? ???? ????? ??? ?? ???? ? ?? ???? ???? ?? ?? ?? ? ????? :
(i) ?? ????? ? -???? ??? ?? 39 ????? ? ??? ? ????????? ? ?? ???? ??? ?
(ii) ?? ????? ?-???? ????? ?? ??? ??? ?? ????? ???? ??? ?? – ?,??,??,?? ??
? ? ?
(iii) ????? ?? – ????? ? ?
??? ?? 1??? 20 ?? ????? ??? ??? ?????? ?? ????? ? ??? ? ???????? ????? ? 1 ?
?? ?? ?? ?
(iv) ????? ?? – ????? ? ?
??? ?? 21??? 26 ?? ??? ??-??????? ?????? ?? ????? ? ??? ? ???????? ????? ? 2 ?
???? ??
?? ? ?? ????? ??? ?? ????? 30 ?? 50 ???????? ??? ????? ???? ????? ?
(v) ????? ?? – ????? ? ?
??? ?? 27 ?? 33 ?? ??-??????? ?????? ?? ????? ? ??? ? ????? ?? ? ????? ? 3 ?
???? ?? ?? ? ??
????? ??? ?? ????? 50 ?? 80 ??? ????? ??? ????? ???? ????? ?
(vi) ????? ?? – ????? ? ?
??? ?? 34 ?? 36 ?? ??????-??????? ?????? ?? ????? ? ??? ? ????? ?? ? ????? ? 5 ?
???? ?? ?? ?
?? ????? ??? ?? ????? 80 ?? 120 ??? ????? ??? ????? ???? ????? ?
(vii) ????? ?? – ????? ? ?
??? ?? 37 ?? 39 ?? 3 ????? -??????? /?????? -??? ???? ??????? ?? ???? ??
??? ??
4 ?
???? ?? ????? ? (??-????? ??? ????) ??? ?
(viii) ????? ? -???? ??? ????? ????? ? ???? ?????? ??? ?? ? ??????, ??? ????? ??? ?
????? ????? ? ????? ?? ??? ? ?? ??????
?? ????? ??? ??? ??? ?? ?? ?????? ?? ????? ??????? ?
???? ? $
????? ? ?
??? ?? 1 ?? 20 ?? ?? ???????? ????? ? ??? ????? ?? ??? ????? ??? ??? ?? ???? ???? ????? ? ????? ??
? ? ? ? ?? ? ????? ?? ? ? ??? ??????? ?
??? ???? ?? ? 20 ?1=20
1. ????????????? ????????? ?????? ?? ?????? ?????? :
p Al + q H
2
O ? ? ? r Al
2
O
3
+ s H
2
?? ????????? ?????? ?? ?
????? ? ? ???? ? ? ?? ? ?, ‘p’, ‘q’, ‘r’ ?? ‘s’ ? ? ??? ?????: ???? ?????? :
(A) 3, 2, 2, 1 (B) 2, 3, 3, 1
(C) 2, 3, 1, 3 (D) 3, 1, 2, 2
2. ????? ? ??????? ??? ?? ???-?? ?? ?????? ? ??? ????? ? ? ?????? ?? ??????? ????? ??? ?? ?
(A) NaCl, Na
2
SO
4
, CaSO
4
(B) K
2
SO
4
, Na
2
SO
4
, CaSO
4
(C) NaNO
3
, CaCO
3
, Na
2
CO
3
(D) MgSO
4
, CuSO
4
, MgCl
2
*31/3/1* 3 # [ P.T.O. ]
*ECNEICS*
General Instructions :
Read the following instructions very carefully and strictly follow them :
(i) This question paper comprises 39 questions. All questions are compulsory.
(ii) This question paper is divided into five sections – A, B, C, D and E.
(iii) Section A – Questions No. 1 to 20 are Multiple Choice Questions. Each
question carries 1 mark.
(iv) Section B – Questions No. 21 to 26 are Very Short Answer type questions.
Each question carries 2 marks. Answer to these questions should be in the
range of 30 to 50 words.
(v) Section C – Questions No. 27 to 33 are Short Answer type questions. Each
question carries 3 marks. Answer to these questions should in the range of
50 to 80 words.
(vi) Section D – Questions No. 34 to 36 are Long Answer type questions. Each
question carries 5 marks. Answer to these questions should be in the range of
80 to 120 words.
(vii) Section E – Questions No. 37 to 39 are of 3 source-based/case-based units of
assessment carrying 4 marks each with sub-parts.
(viii) There is no overall choice. However, an internal choice has been provided in
some sections. Only one of the alternatives has to be attempted in such
questions.
SECTION A
Select and write the most appropriate option out of the four options given for
each of the questions no. 1 to 20. There is no negative marking for incorrect
response. 20 ?1=20
1. Consider the following chemical equation :
p Al + q H
2
O ? ? ? r Al
2
O
3
+ s H
2
To balance this chemical equation, the values of ‘p’, ‘q’, ‘r’ and ‘s’ must be
respectively :
(A) 3, 2, 2, 1 (B) 2, 3, 3, 1
(C) 2, 3, 1, 3 (D) 3, 1, 2, 2
2. Which of the given option represents a family of salts ?
(A) NaCl, Na
2
SO
4
, CaSO
4
(B) K
2
SO
4
, Na
2
SO
4
, CaSO
4
(C) NaNO
3
, CaCO
3
, Na
2
CO
3
(D) MgSO
4
, CuSO
4
, MgCl
2
*31/3/1* 4 #
*ECNEICS*
3. ??? ?? ?? ??? ??? ?? ? ? ???
? ? ? ?? ??? ????? ?? ????????? ? ?????? ?? :
(A) ????? ? ? ????? ?????
(B) ????????? ? ? ????? ?????
(C) ?? ??? ??? ??? ? ? ?? ??? ?????
(D) ?? ???? ??-?????? ?????
4. ???? ? ? ? ?? ???? ??? ????? ?? ?
????? ??? ?? ??? ??? ? ???? ?? ????????? ??? ?? ?? ?? ?
????? ?
? ?? ???? ??
?? ?? ?
? ??? ?? ?
??
??? ? ? ??? :
(i)
HHH
– C – C – C = C – H H
H H H
???
? ? ?
(ii)
H H H H
– C – C – C – C – H H
H H H H
? ? ? ?
? ? ? ?
(iii)
(iv)
H H H
– C – C – C = C – H C
HHH
l
? ??
???
(A) (i) ?? (iv)
(B) (ii) ?? (iv)
(C) (ii) ?? (iii)
(D) (i) ?? (iii)
5. ??? ???? ????? ? ? ????????????? ??? ??? ????? ?????? ? ??????????? ? ? ?????? ??? ???? ???? ? ???? ?? ?
(A) ?? ??? ?
??? ? ??? ? ?? ??? ?? ?? ?
(B) ?? ??????????? ??? ?? ? ?????? ????????? ????? ???? ?? ?? ??????????? ??? ???? ?? ?
(C) ????? ?? ? ??? ?? ??? ???? ???
? ? ? ??? ? ? ?? ??? ??
?? ???? ??? ?
(D) ?? ??? ? ????? ???? ?? ?? ???? ???? ?? ? ??? ???? ?? ? ? ?
??? ? ??? ? ?? ??? ?? ?? ?
Page 5
*31/3/1* 1 # [ P.T.O. ]
*ECNEICS*
??????????? ????? ? -???? ??? ?? ????? -???? ???? ? ?
???-????? ?? ???? ? ?? ? ??? ?
Candidates must write the Q.P. Code
on the title page of the answer-book.
Series : 3EGFH
SET~1
????? ? -???? ???
Q.P. Code
??? ?
?.
Roll No.
???
NOTE
(I) ? ? ??? ?? ??? ?? ? ?? ?? ? ?? ????? ? -???? ??? ???? ?? ?????
27 ??? ?
(I) Please check that this question paper
contains 27 printed pages.
(II) ????? ? -???? ??? ??????? ????? ?? ?? ???? ??
????? ? -???? ??? ?? ??????????? ????? -???? ???? ? ?
???-????? ?? ?????? ?
(II)
Q.P. Code given on the right hand
side of the question paper should be
written on the title page of the
answer-book by the candidate.
(III) ? ? ??? ????? ?? ??? ??? ?? ????? ? -???? ??? 39 ????? ?
??? ?
(III) Please check that this question paper
contains 39 questions.
(IV) ? ? ??? ????? ? ?? ???? ? ????? ???? ???? ??
????, ????? -????? ?? ??? ??? ???? ?? ????? ?
?? ??? ??
??? ???? ? ????? ?
(IV)
Please write down the Serial
Number of the question in the
answer-book at the given place
before attempting it.
(V) ?? ????? ? -???? ?? ????? ? ? ???? 15 ????? ??
??? ????? ??? ?? ? ????? ? -???? ?? ?? ???? ???? ????
??? 10.15 ??? ????? ????? ? 10.15 ??? ??
10.30 ??? ?? ??????????? ? ? ?? ????? ? -???? ??
??????? ?? ?? ????? ? ? ????? ?? ????? -???? ????
?? ??? ????? ???? ???????? ?
(V)
15 minute time has been allotted to
read this question paper. The
question paper will be distributed
at 10.15 a.m. From 10.15 a.m. to
10.30 a.m., the candidates will
read the question paper only and
will not write any answer on the
answer-book during this period.
???????
SCIENCE
????????? ??? : 3 ????? ???? ??? ?
?? : 80
Time allowed : 3 hours Maximum Marks : 80
31/3/1
#
*31/3/1* 2 #
*ECNEICS*
???????? ?? ?????? ?:
?? ?? ?? ? ? ?? ??????? ?? ???? ????? ??? ?? ???? ? ?? ???? ???? ?? ?? ?? ? ????? :
(i) ?? ????? ? -???? ??? ?? 39 ????? ? ??? ? ????????? ? ?? ???? ??? ?
(ii) ?? ????? ?-???? ????? ?? ??? ??? ?? ????? ???? ??? ?? – ?,??,??,?? ??
? ? ?
(iii) ????? ?? – ????? ? ?
??? ?? 1??? 20 ?? ????? ??? ??? ?????? ?? ????? ? ??? ? ???????? ????? ? 1 ?
?? ?? ?? ?
(iv) ????? ?? – ????? ? ?
??? ?? 21??? 26 ?? ??? ??-??????? ?????? ?? ????? ? ??? ? ???????? ????? ? 2 ?
???? ??
?? ? ?? ????? ??? ?? ????? 30 ?? 50 ???????? ??? ????? ???? ????? ?
(v) ????? ?? – ????? ? ?
??? ?? 27 ?? 33 ?? ??-??????? ?????? ?? ????? ? ??? ? ????? ?? ? ????? ? 3 ?
???? ?? ?? ? ??
????? ??? ?? ????? 50 ?? 80 ??? ????? ??? ????? ???? ????? ?
(vi) ????? ?? – ????? ? ?
??? ?? 34 ?? 36 ?? ??????-??????? ?????? ?? ????? ? ??? ? ????? ?? ? ????? ? 5 ?
???? ?? ?? ?
?? ????? ??? ?? ????? 80 ?? 120 ??? ????? ??? ????? ???? ????? ?
(vii) ????? ?? – ????? ? ?
??? ?? 37 ?? 39 ?? 3 ????? -??????? /?????? -??? ???? ??????? ?? ???? ??
??? ??
4 ?
???? ?? ????? ? (??-????? ??? ????) ??? ?
(viii) ????? ? -???? ??? ????? ????? ? ???? ?????? ??? ?? ? ??????, ??? ????? ??? ?
????? ????? ? ????? ?? ??? ? ?? ??????
?? ????? ??? ??? ??? ?? ?? ?????? ?? ????? ??????? ?
???? ? $
????? ? ?
??? ?? 1 ?? 20 ?? ?? ???????? ????? ? ??? ????? ?? ??? ????? ??? ??? ?? ???? ???? ????? ? ????? ??
? ? ? ? ?? ? ????? ?? ? ? ??? ??????? ?
??? ???? ?? ? 20 ?1=20
1. ????????????? ????????? ?????? ?? ?????? ?????? :
p Al + q H
2
O ? ? ? r Al
2
O
3
+ s H
2
?? ????????? ?????? ?? ?
????? ? ? ???? ? ? ?? ? ?, ‘p’, ‘q’, ‘r’ ?? ‘s’ ? ? ??? ?????: ???? ?????? :
(A) 3, 2, 2, 1 (B) 2, 3, 3, 1
(C) 2, 3, 1, 3 (D) 3, 1, 2, 2
2. ????? ? ??????? ??? ?? ???-?? ?? ?????? ? ??? ????? ? ? ?????? ?? ??????? ????? ??? ?? ?
(A) NaCl, Na
2
SO
4
, CaSO
4
(B) K
2
SO
4
, Na
2
SO
4
, CaSO
4
(C) NaNO
3
, CaCO
3
, Na
2
CO
3
(D) MgSO
4
, CuSO
4
, MgCl
2
*31/3/1* 3 # [ P.T.O. ]
*ECNEICS*
General Instructions :
Read the following instructions very carefully and strictly follow them :
(i) This question paper comprises 39 questions. All questions are compulsory.
(ii) This question paper is divided into five sections – A, B, C, D and E.
(iii) Section A – Questions No. 1 to 20 are Multiple Choice Questions. Each
question carries 1 mark.
(iv) Section B – Questions No. 21 to 26 are Very Short Answer type questions.
Each question carries 2 marks. Answer to these questions should be in the
range of 30 to 50 words.
(v) Section C – Questions No. 27 to 33 are Short Answer type questions. Each
question carries 3 marks. Answer to these questions should in the range of
50 to 80 words.
(vi) Section D – Questions No. 34 to 36 are Long Answer type questions. Each
question carries 5 marks. Answer to these questions should be in the range of
80 to 120 words.
(vii) Section E – Questions No. 37 to 39 are of 3 source-based/case-based units of
assessment carrying 4 marks each with sub-parts.
(viii) There is no overall choice. However, an internal choice has been provided in
some sections. Only one of the alternatives has to be attempted in such
questions.
SECTION A
Select and write the most appropriate option out of the four options given for
each of the questions no. 1 to 20. There is no negative marking for incorrect
response. 20 ?1=20
1. Consider the following chemical equation :
p Al + q H
2
O ? ? ? r Al
2
O
3
+ s H
2
To balance this chemical equation, the values of ‘p’, ‘q’, ‘r’ and ‘s’ must be
respectively :
(A) 3, 2, 2, 1 (B) 2, 3, 3, 1
(C) 2, 3, 1, 3 (D) 3, 1, 2, 2
2. Which of the given option represents a family of salts ?
(A) NaCl, Na
2
SO
4
, CaSO
4
(B) K
2
SO
4
, Na
2
SO
4
, CaSO
4
(C) NaNO
3
, CaCO
3
, Na
2
CO
3
(D) MgSO
4
, CuSO
4
, MgCl
2
*31/3/1* 4 #
*ECNEICS*
3. ??? ?? ?? ??? ??? ?? ? ? ???
? ? ? ?? ??? ????? ?? ????????? ? ?????? ?? :
(A) ????? ? ? ????? ?????
(B) ????????? ? ? ????? ?????
(C) ?? ??? ??? ??? ? ? ?? ??? ?????
(D) ?? ???? ??-?????? ?????
4. ???? ? ? ? ?? ???? ??? ????? ?? ?
????? ??? ?? ??? ??? ? ???? ?? ????????? ??? ?? ?? ?? ?
????? ?
? ?? ???? ??
?? ?? ?
? ??? ?? ?
??
??? ? ? ??? :
(i)
HHH
– C – C – C = C – H H
H H H
???
? ? ?
(ii)
H H H H
– C – C – C – C – H H
H H H H
? ? ? ?
? ? ? ?
(iii)
(iv)
H H H
– C – C – C = C – H C
HHH
l
? ??
???
(A) (i) ?? (iv)
(B) (ii) ?? (iv)
(C) (ii) ?? (iii)
(D) (i) ?? (iii)
5. ??? ???? ????? ? ? ????????????? ??? ??? ????? ?????? ? ??????????? ? ? ?????? ??? ???? ???? ? ???? ?? ?
(A) ?? ??? ?
??? ? ??? ? ?? ??? ?? ?? ?
(B) ?? ??????????? ??? ?? ? ?????? ????????? ????? ???? ?? ?? ??????????? ??? ???? ?? ?
(C) ????? ?? ? ??? ?? ??? ???? ???
? ? ? ??? ? ? ?? ??? ??
?? ???? ??? ?
(D) ?? ??? ? ????? ???? ?? ?? ???? ???? ?? ? ??? ???? ?? ? ? ?
??? ? ??? ? ?? ??? ?? ?? ?
*31/3/1* 5 # [ P.T.O. ]
*ECNEICS*
3. The most common method of extraction of metals from their oxide ores
is :
(A) Reduction with carbon
(B) Reduction with hydrogen
(C) Reduction with aluminium
(D) Electrolytic reduction
4. Given below are the structures of some hydrocarbons. Select the two
structures which are related to each other from the given options :
(i)
HHH
– C – C – C = C – H H
H H H
???
? ? ?
(ii)
H H H H
– C – C – C – C – H H
H H H H
? ? ? ?
? ? ? ?
(iii)
(iv)
H H H
– C – C – C = C – H C
HHH
l
? ??
???
(A) (i) and (iv)
(B) (ii) and (iv)
(C) (ii) and (iii)
(D) (i) and (iii)
5. Choose the incorrect statement about the common reaction used in
hydrogenation of vegetable oils.
(A) It is an addition reaction.
(B) It takes place in the presence of nickel or palladium catalyst.
(C) The product contains only single bonds between carbon atoms.
(D) It is an addition reaction which occurs in the presence of an acid
catalyst.
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FAQs on CBSE Science Past Year Paper with Solutions - 2025 (Set - 3) - Science Class 10
| 1. What topics are typically covered in the CBSE Class 10 Science exam? |  |
Ans. The CBSE Class 10 Science exam generally covers a wide range of topics including:
1. <b>Chemical Substances</b>: Properties and changes, acids, bases, and salts.
2. <b>Life Processes</b>: Nutrition, respiration, transportation, and excretion in plants and animals.
3. <b>Control and Coordination</b>: Nervous and hormonal systems in humans and plants.
4. <b>How Things Work</b>: Simple machines, electric circuits, and the effects of electric current.
5. <b>Natural Resources</b>: Air, water, and topics related to environmental science.
These topics are essential for understanding the basic principles of science and form the foundation for higher studies.
| 2. How can students effectively prepare for the CBSE Class 10 Science exam? | |
Ans. Students can prepare for the CBSE Class 10 Science exam effectively by following these strategies:
1. <b>Understand the Syllabus</b>: Familiarize yourself with the syllabus and exam pattern.
2. <b>Study NCERT Textbooks</b>: Focus on the NCERT textbooks as they are the primary source for exam questions.
3. <b>Practice Previous Year Papers</b>: Solve past year question papers to understand the question pattern and frequently asked questions.
4. <b>Make Notes</b>: Create concise notes for quick revision before exams.
5. <b>Conduct Experiments</b>: Hands-on experience through lab experiments can help reinforce theoretical concepts.
| 3. What is the importance of solving past year papers for the CBSE Class 10 Science exam? | |
Ans. Solving past year papers is crucial for several reasons:
1. <b>Familiarity with Format</b>: It helps students understand the exam format and types of questions asked.
2. <b>Time Management</b>: Practicing with a timed setting allows students to manage their time effectively during the actual exam.
3. <b>Identifying Weak Areas</b>: By reviewing answers, students can identify topics they need to focus on.
4. <b>Confidence Building</b>: Regular practice increases confidence and reduces anxiety before exams.
5. <b>Reinforcement of Learning</b>: It reinforces knowledge and helps in retaining information better.
| 4. What are some common mistakes to avoid during the CBSE Class 10 Science exam? | |
Ans. Students should avoid the following common mistakes during the exam:
1. <b>Neglecting the Instructions</b>: Failing to read the instructions carefully can lead to unnecessary mistakes.
2. <b>Poor Time Management</b>: Spending too much time on difficult questions can leave little time for others.
3. <b>Ignoring Diagrams and Labels</b>: Not including diagrams or properly labeling them can result in lost marks.
4. <b>Lack of Clarity in Answers</b>: Writing vague or unclear answers can confuse the examiner.
5. <b>Skipping Revision</b>: Not leaving time for revision can lead to missing out on correcting mistakes or enhancing answers.
| 5. How are practical exams integrated into the CBSE Class 10 Science assessment? | |
Ans. Practical exams are an integral part of the CBSE Class 10 Science assessment as they account for a significant portion of the overall grade. The practical exam typically includes:
1. <b>Experiments</b>: Students are required to perform experiments from the syllabus and demonstrate their understanding.
2. <b>Record Keeping</b>: Maintaining a practical lab notebook with observations and results is essential.
3. <b>Viva Voce</b>: Students may be asked questions regarding the experiments to assess their understanding.
4. <b>Marks Allocation</b>: A specific number of marks are allocated for the practical exam, which contributes to the overall subject score.
5. <b>Skill Development</b>: These practicals help in developing scientific skills and concepts that are crucial for further education in science.
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