Class 10 Exam > Class 10 Notes > Science Class 10 > CBSE Science Past Year Paper with Solutions - 2025 (Set - 1)
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Page 1
*31/1/1* 1 # [ P.T.O. ]
*ECNEICS*
??????????? ????? ? -???? ??? ?? ????? -???? ???? ? ?
???-????? ?? ???? ? ?? ? ??? ?
Candidates must write the Q.P. Code
on the title page of the answer-book.
Series : 1GEFH
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
31/1/1
#
Page 2
*31/1/1* 1 # [ P.T.O. ]
*ECNEICS*
??????????? ????? ? -???? ??? ?? ????? -???? ???? ? ?
???-????? ?? ???? ? ?? ? ??? ?
Candidates must write the Q.P. Code
on the title page of the answer-book.
Series : 1GEFH
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
31/1/1
#
*31/1/1* 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. ?? ?? ?? ???? ??-????? ?? ??????? (?????) ????????? ?? ? ?? ? ? ?? ???? ??-????? ? ? ???
????????? ??? ?? ?????? ? ????? – ?? ???? ??? ?? ????? ???? ? ? ??? ??? ??? ?? ????? ? (M
H
: M
O
) ????
?? :
(A) 8 : 1 (B) 2 : 1
(C) 1 : 2 (D) 1 : 8
2. ?? ?? ?? ???? ???? ?? ? ??? ?? ??? ??? ??? ?? ??????????? ? ? ??? ???? ?? ???? ???? ?????? ??? : ??? :
(A) Al
3
O
4
?? MgO
2
(B) Al
2
O
3
?? MgO
(C) Al
3
O
4
?? MgO (D) Al
2
O
3
?? MgO
2
Page 3
*31/1/1* 1 # [ P.T.O. ]
*ECNEICS*
??????????? ????? ? -???? ??? ?? ????? -???? ???? ? ?
???-????? ?? ???? ? ?? ? ??? ?
Candidates must write the Q.P. Code
on the title page of the answer-book.
Series : 1GEFH
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
31/1/1
#
*31/1/1* 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. ?? ?? ?? ???? ??-????? ?? ??????? (?????) ????????? ?? ? ?? ? ? ?? ???? ??-????? ? ? ???
????????? ??? ?? ?????? ? ????? – ?? ???? ??? ?? ????? ???? ? ? ??? ??? ??? ?? ????? ? (M
H
: M
O
) ????
?? :
(A) 8 : 1 (B) 2 : 1
(C) 1 : 2 (D) 1 : 8
2. ?? ?? ?? ???? ???? ?? ? ??? ?? ??? ??? ??? ?? ??????????? ? ? ??? ???? ?? ???? ???? ?????? ??? : ??? :
(A) Al
3
O
4
?? MgO
2
(B) Al
2
O
3
?? MgO
(C) Al
3
O
4
?? MgO (D) Al
2
O
3
?? MgO
2
*31/1/1* 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. Electrolysis of water is a decomposition reaction. The mass ratio
(M
H
: M
O
) of hydrogen and oxygen gases liberated at the electrodes
during electrolysis of water is :
(A) 8 : 1 (B) 2 : 1
(C) 1 : 2 (D) 1 : 8
2. The products formed when Aluminium and Magnesium are burnt in the
presence of air respectively are :
(A) Al
3
O
4
and MgO
2
(B) Al
2
O
3
and MgO
(C) Al
3
O
4
and MgO (D) Al
2
O
3
and MgO
2
Page 4
*31/1/1* 1 # [ P.T.O. ]
*ECNEICS*
??????????? ????? ? -???? ??? ?? ????? -???? ???? ? ?
???-????? ?? ???? ? ?? ? ??? ?
Candidates must write the Q.P. Code
on the title page of the answer-book.
Series : 1GEFH
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
31/1/1
#
*31/1/1* 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. ?? ?? ?? ???? ??-????? ?? ??????? (?????) ????????? ?? ? ?? ? ? ?? ???? ??-????? ? ? ???
????????? ??? ?? ?????? ? ????? – ?? ???? ??? ?? ????? ???? ? ? ??? ??? ??? ?? ????? ? (M
H
: M
O
) ????
?? :
(A) 8 : 1 (B) 2 : 1
(C) 1 : 2 (D) 1 : 8
2. ?? ?? ?? ???? ???? ?? ? ??? ?? ??? ??? ??? ?? ??????????? ? ? ??? ???? ?? ???? ???? ?????? ??? : ??? :
(A) Al
3
O
4
?? MgO
2
(B) Al
2
O
3
?? MgO
(C) Al
3
O
4
?? MgO (D) Al
2
O
3
?? MgO
2
*31/1/1* 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. Electrolysis of water is a decomposition reaction. The mass ratio
(M
H
: M
O
) of hydrogen and oxygen gases liberated at the electrodes
during electrolysis of water is :
(A) 8 : 1 (B) 2 : 1
(C) 1 : 2 (D) 1 : 8
2. The products formed when Aluminium and Magnesium are burnt in the
presence of air respectively are :
(A) Al
3
O
4
and MgO
2
(B) Al
2
O
3
and MgO
(C) Al
3
O
4
and MgO (D) Al
2
O
3
and MgO
2
*31/1/1* 4 #
*ECNEICS*
3. ????????????? ??????? ??? pH ?? ? ? ?? ??? ???????? A, B, C ?? D ?? pH ??? ???? ? ?? ??? :
1 2 3 4 5 6 7 8 9 10 11 12 13 14
?? ????? ?????? A, B, C ?? D ??? : ???
(A) ??? ?? ??? ? , ?
? ??? ??? ? , ??? ???, ??? ?? ??? ? ??
(B) ?
? ??? ??? ? , ??? ???, ?
? ??? ??? ? ??, ????? ??????
(C) ?
? ??? ??? ? , ??? ???, ??? ?? ??? ? ??, ?
? ??? ??? ? ??
(D) ?
? ??? ??? ? , ??? ???, ??? ?? ??? ? ??, ??? ?? ??? ?
4. ????????????? ????????? ?
? ?? ?????? ?????? :
(i) ??? ?? ???? ????? ? ?? ?? ??? ? , ??????? ??????? ???????? ?? ????????? ???? ?? ?
(ii) ??????????? ????????? , ??? ?? ???? ????? ? ?? ?? ??? ? ?? ????????? ???? ?? ?
(iii) ????? ???????????? , ??????? ??????? ???????? ?? ????????? ???? ?? ?
?? ???? ???? ?? ??? ???????? ?????? ??? :
(A) ??? ?? ?? ???? ?? ?
(B) ?????? ??? ???? ??? ?
(C) ????????? ??? ???? ?? ?
(D) ?????? ??? ???? ??? ?
5. ?? ???????? A ?? B ? ? ??? ????????? ?? ??? ?????? C ???? ?? ? A ?????????? ???? ?? ????? B
?????????? ????? ???? ?? ? ?????? C ????????????? ??? ?? ???-?? ?? ??? ???? ??????? ?
(A) ???? ?? ?? ?? ??? ? ?? ?
(B) ?? ?? ??? ???????? ?????? ?? ?
(C) ??? ? ???????? (??????? ??????? ) ????? ? ? ??? ?
? ??? ?? ???? ?-????? ?? ?????? ?? ?? ?
(D) ?? ???? ??? ? ? ?????? ? ???? ?? ?? ?? ?? ?? ?? ??? ?? ???? ?? ?? ? ? ???? ?? ?
?
?
D
?
A
C B
?
Page 5
*31/1/1* 1 # [ P.T.O. ]
*ECNEICS*
??????????? ????? ? -???? ??? ?? ????? -???? ???? ? ?
???-????? ?? ???? ? ?? ? ??? ?
Candidates must write the Q.P. Code
on the title page of the answer-book.
Series : 1GEFH
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
31/1/1
#
*31/1/1* 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. ?? ?? ?? ???? ??-????? ?? ??????? (?????) ????????? ?? ? ?? ? ? ?? ???? ??-????? ? ? ???
????????? ??? ?? ?????? ? ????? – ?? ???? ??? ?? ????? ???? ? ? ??? ??? ??? ?? ????? ? (M
H
: M
O
) ????
?? :
(A) 8 : 1 (B) 2 : 1
(C) 1 : 2 (D) 1 : 8
2. ?? ?? ?? ???? ???? ?? ? ??? ?? ??? ??? ??? ?? ??????????? ? ? ??? ???? ?? ???? ???? ?????? ??? : ??? :
(A) Al
3
O
4
?? MgO
2
(B) Al
2
O
3
?? MgO
(C) Al
3
O
4
?? MgO (D) Al
2
O
3
?? MgO
2
*31/1/1* 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. Electrolysis of water is a decomposition reaction. The mass ratio
(M
H
: M
O
) of hydrogen and oxygen gases liberated at the electrodes
during electrolysis of water is :
(A) 8 : 1 (B) 2 : 1
(C) 1 : 2 (D) 1 : 8
2. The products formed when Aluminium and Magnesium are burnt in the
presence of air respectively are :
(A) Al
3
O
4
and MgO
2
(B) Al
2
O
3
and MgO
(C) Al
3
O
4
and MgO (D) Al
2
O
3
and MgO
2
*31/1/1* 4 #
*ECNEICS*
3. ????????????? ??????? ??? pH ?? ? ? ?? ??? ???????? A, B, C ?? D ?? pH ??? ???? ? ?? ??? :
1 2 3 4 5 6 7 8 9 10 11 12 13 14
?? ????? ?????? A, B, C ?? D ??? : ???
(A) ??? ?? ??? ? , ?
? ??? ??? ? , ??? ???, ??? ?? ??? ? ??
(B) ?
? ??? ??? ? , ??? ???, ?
? ??? ??? ? ??, ????? ??????
(C) ?
? ??? ??? ? , ??? ???, ??? ?? ??? ? ??, ?
? ??? ??? ? ??
(D) ?
? ??? ??? ? , ??? ???, ??? ?? ??? ? ??, ??? ?? ??? ?
4. ????????????? ????????? ?
? ?? ?????? ?????? :
(i) ??? ?? ???? ????? ? ?? ?? ??? ? , ??????? ??????? ???????? ?? ????????? ???? ?? ?
(ii) ??????????? ????????? , ??? ?? ???? ????? ? ?? ?? ??? ? ?? ????????? ???? ?? ?
(iii) ????? ???????????? , ??????? ??????? ???????? ?? ????????? ???? ?? ?
?? ???? ???? ?? ??? ???????? ?????? ??? :
(A) ??? ?? ?? ???? ?? ?
(B) ?????? ??? ???? ??? ?
(C) ????????? ??? ???? ?? ?
(D) ?????? ??? ???? ??? ?
5. ?? ???????? A ?? B ? ? ??? ????????? ?? ??? ?????? C ???? ?? ? A ?????????? ???? ?? ????? B
?????????? ????? ???? ?? ? ?????? C ????????????? ??? ?? ???-?? ?? ??? ???? ??????? ?
(A) ???? ?? ?? ?? ??? ? ?? ?
(B) ?? ?? ??? ???????? ?????? ?? ?
(C) ??? ? ???????? (??????? ??????? ) ????? ? ? ??? ?
? ??? ?? ???? ?-????? ?? ?????? ?? ?? ?
(D) ?? ???? ??? ? ? ?????? ? ???? ?? ?? ?? ?? ?? ?? ??? ?? ???? ?? ?? ? ? ???? ?? ?
?
?
D
?
A
C B
?
*31/1/1* 5 # [ P.T.O. ]
*ECNEICS*
3. The following table shows the pH values of four solutions A, B, C and D
on a pH scale :
1 2 3 4 5 6 7 8 9 10 11 12 13 14
The solutions A, B, C and D respectively are of a
(A) Strong acid, weak acid, neutral, strong base
(B) Weak acid, neutral, weak base, strong base
(C) Weak acid, neutral, strong base, weak base
(D) Weak acid, neutral, strong base, strong acid
4. Consider the following reactions :
(i) Dilute hydrochloric acid reacts with sodium hydroxide.
(ii) Magnesium oxide reacts with dilute hydrochloric acid.
(iii) Carbon dioxide reacts with sodium hydroxide.
It is found that in each case :
(A) Salt and water is formed.
(B) Neutral salts are formed.
(C) Hydrogen gas is formed.
(D) Acidic salts are formed.
5. Reaction between two elements A and B, forms a compound C. A loses
electrons and B gains electrons. Which one of the following properties
will not be shown by compound C ?
(A) It has high melting point.
(B) It is highly soluble in water.
(C) It has weak electrostatic forces of attraction between its oppositely
charged ions.
(D) It conducts electricity in its molten state or aqueous solution.
?
?
D
?
C
B
A
?
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FAQs on CBSE Science Past Year Paper with Solutions - 2025 (Set - 1) - Science Class 10
| 1. What is the importance of solving past year papers for CBSE Science exams? |  |
Ans. Solving past year papers for CBSE Science exams is crucial for several reasons. It helps students understand the exam pattern, types of questions asked, and the marking scheme. Additionally, it allows students to identify important topics that frequently appear in exams, enabling them to focus their revision effectively. Moreover, practicing these papers enhances time management skills and boosts confidence as students become familiar with the format and pressure of the actual exam.
| 2. How can students effectively use the solutions provided in past year papers? | |
Ans. Students can effectively use the solutions provided in past year papers by first attempting to solve the questions on their own before referring to the solutions. This approach encourages critical thinking and problem-solving skills. After checking their answers against the solutions, students should analyze any mistakes to understand where they went wrong. Additionally, they can learn different methods to approach a problem by reviewing various solution strategies.
| 3. What are the common topics covered in the Class 10 CBSE Science syllabus that may appear in past year papers? | |
Ans. The Class 10 CBSE Science syllabus typically covers a variety of topics, including but not limited to:
1. Chemical substances - Nature and behaviour
2. World of living things
3. Natural resources
4. Effects of current
5. Light
6. Human eye and the colourful world
7. Acids, bases and salts
8. Metals and non-metals
These topics are essential for students to study, as they often form the basis for questions in past year papers.
| 4. What strategies can students implement to prepare for the Science exam using past year papers? | |
Ans. Students can implement several strategies to prepare for the Science exam using past year papers:
1. Create a study schedule that allocates specific times for solving past papers.
2. Start with earlier years and gradually progress to the most recent papers to track improvement.
3. Group similar topics together to handle them comprehensively.
4. Simulate exam conditions by timing themselves while solving the papers to improve time management.
5. Review and revise the concepts related to questions they find challenging after attempting the papers.
| 5. How do the marking schemes for past year papers help in exam preparation? | |
Ans. The marking schemes for past year papers provide insight into how marks are distributed across different types of questions, such as short answers, long answers, and practical applications. Understanding the marking scheme helps students prioritize their study efforts on higher-weighted topics and question types. It also guides them on how to structure their answers effectively to maximize their scores, ensuring that they meet the expectations of examiners.
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