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Previous year paper for science class 10th

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This is a previous year paper for class 10th CBSE . By attempting them students can perform better in actual exam . Get serious for boards. Every paper leads to great path of success I used these when I used to be a student they helped me learn faster and quick recalled me of something I forgot and when I attended the actual exam i performed best in my district with A+ grade You can do it just believe in yourself and solve these papers

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*ECNEICS*
Series : 1GEFH SET~1
प्रश्न-पत्र कोड
Q.P. Code 31/1/1
रोि नं. परीक्षार्थी प्रश्न-पत्र कोड को उत्तर-पस्ु तिका के
Roll No. मख
ु -पृष्ठ पर अवश्य स्िखें ।
Candidates must write the Q.P. Code
on the title page of the answer-book.

नोट NOTE

(I) कृ पया जााँच कर िें स्क इस प्रश्न-पत्र में मस्ु िि पृष्ठ (I) Please check that this question paper
27 हैं । contains 27 printed pages.

(II) प्रश्न-पत्र में दास्हने हार्थ की ओर स्दए गए (II) Q.P. Code given on the right hand
प्रश्न-पत्र कोड को परीक्षार्थी उत्तर-पस्ु तिका के side of the question paper should be
written on the title page of the
मख ु -पृष्ठ पर स्िखें । answer-book by the candidate.

(III) कृ पया जााँच कर िें स्क इस प्रश्न-पत्र में 39 प्रश्न (III) Please check that this question paper
हैं । contains 39 questions.

(IV) कृपया प्रश्न का उत्तर लिखना शुरू करने से (IV) Please write down the Serial
पहिे, उत्तर-पुलतिका में यथा तथान पर प्रश्न Number of the question in the
answer-book at the given place
का क्रमाांक अवश्य लिखें । before attempting it.
(V) इस प्रश्न-पत्र को पढ़ने के स्िए 15 स्मनट का (V) 15 minute time has been allotted to
समय स्दया गया है । प्रश्न-पत्र का स्विरण पवू ााह्न read this question paper. The
question paper will be distributed
में 10.15 बजे स्कया जाएगा । 10.15 बजे से at 10.15 a.m. From 10.15 a.m. to
10.30 बजे िक परीक्षार्थी के वि प्रश्न-पत्र को 10.30 a.m., the candidates will
पढ़ेंगे और इस अवस्ि के दौरान वे उत्तर-पस्ु तिका read the question paper only and
पर कोई उत्तर नहीं स्िखेंगे । will not write any answer on the
# answer-book during this period.



विज्ञान
SCIENCE

निर्धारित समय : 3 घण्टे अनर्कतम अंक : 80
Time allowed : 3 hours Maximum Marks : 80

*31/1/1* 1 # [ P.T.O. ]

, *ECNEICS*
सामान्‍य‍न ‍र्देश‍:
निम्िन न त निर्देशों को बहुत सधवर्धिी से पऩिए औि उिकध सख़्ती से पध ि कीनिए :
(i) इस प्रश्ि-पत्र में कु 39 प्रश्ि हैं । सभी‍प्रश्ि अन वायय हैं ।
(ii) यह प्रश्ि-पत्र पााँच ण्डों में नवभधनित नकयध गयध है – क,‍ख,‍ग,‍घ एवं ङ ।
(iii) खण्‍ड‍क – प्रश्ि संख्यध 1‍से 20 तक बहुनवकल्पीय प्रकधि के प्रश्ि हैं । प्रत्येक प्रश्ि 1 अंक कध है ।
(iv) खण्‍ड‍ख – प्रश्ि संख्यध 21‍से 26 तक अनत घ-ु उत्तिीय प्रकधि के प्रश्ि हैं । प्रत्येक प्रश्ि 2 अंकों कध
है । इि प्रश्िों के उत्ति 30 से 50 शब्र्दों में नर्दए िधिे चधनहए ।
(v) खण्‍ड‍ग – प्रश्ि संख्यध 27 से 33 तक घु-उत्तिीय प्रकधि के प्रश्ि हैं । प्रत्येक प्रश्ि 3 अंकों कध है । इि
प्रश्िों के उत्ति 50 से 80 शब्र्दों में नर्दए िधिे चधनहए ।
(vi) खण्‍ड‍घ – प्रश्ि सख्ं यध 34 से 36 तक र्दीघा-उत्तिीय प्रकधि के प्रश्ि हैं । प्रत्येक प्रश्ि 5 अक
ं ों कध है ।
इि प्रश्िों के उत्ति 80 से 120 शब्र्दों में नर्दए िधिे चधनहए ।
(vii) खण्‍ड‍ ङ – प्रश्ि संख्यध 37 से 39 तक 3 स्रोत-आर्धरित/प्रकिण-आर्धरित इकधइयों के मूल्यधंकि के
4 अंकों के प्रश्ि (उप-प्रश्िों सनहत) हैं ।

(viii) प्रश्ि-पत्र में समग्र नवकल्प िहीं नर्दयध गयध है । यद्यनप, कुछ ण्डों में आंतरिक नवकल्प नर्दए गए हैं । इस प्रकधि
के प्रश्िों में के व एक ही नवकल्प कध उत्ति र्दीनिए ।

खण्ड क $

प्रश्ि संख्यध 1 से 20 तक के प्रत्येक प्रश्ि में नर्दए गए चधि नवकल्पों में से सबसे उनचत नवकल्प चनु िए औि
न न ए । ग़ त उत्ति के न ए कोई ॠणधत्मक अक ं ि िहीं है । 201=20

1. जि का स्वद्यिु -अपघटन एक स्वयोजन (अपघटन) अस्िस्िया है । जि के स्वद्यिु -अपघटन के समय
इिेक्ट्रोडों पर मक्ट्ु ि गैसों – हाइड्रोजन और ऑक्ट्सीजन के िव्यमानों का अनपु ाि (MH : MO) होिा
है :
(A) 8:1 (B) 2:1
(C) 1:2 (D) 1:8

2. वायु की उपस्तर्थस्ि में ऐिस्ु मस्नयम और मैग्नीस्ियम के दहन होने पर बनने वािे उत्पाद िमि: हैं :
(A) Al3O4 और MgO2 (B) Al2O3 और MgO

(C) Al3O4 और MgO (D) Al2O3 और MgO2

*31/1/1* 2 #

, *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
(MH : MO) 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) Al3O4 and MgO2 (B) Al2O3 and MgO
(C) Al3O4 and MgO (D) Al2O3 and MgO2

*31/1/1* 3 # [ P.T.O. ]

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Publisher: 2018 ISBN: 9789388240888 Edition: Unknown

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Uploaded on
June 25, 2026
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2025/2026
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