CBSE Class 10 Science Question Paper SA2 2012 (1)

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CBSE Science Question Paper for Class 10 CBSE exams for CBSE Students. Based on CBSE and CCE guidelines. The students should practice these Question Papers to gain perfection which will help him to get more marks in CBSE examination. Please refer to more CBSE Class 10 question papers in other links. The CBSE Question papers are of past examinations. Its always recommended by CBSE to practice the papers released by CBSE to get better exams in CBSE exams. CBSE Last Year Question Papers for class X for final/ term/ SA1/ SA2 Examinations conducted by Central Board of Secondary Education for all CBSE affiliated schools in India and abroad.



Class – X 

General Instructions :

(i) The question paper comprises of two Sections, A and B. You are to attempt both the sections.

(ii) All questions are compulsory.

(iii) There is no overall choice. However, internal choice has been provided in all the five questions of five marks category. Only one option in such questions is to be attempted.

(iv) All questions of Section-A and all questions of Section-B are to be attempted separately.

(v) Question numbers 1 to 4 in Section-A are one mark questions. These are to be answered in one word or in one sentence.

(vi) Question numbers 5 to 13 in Section-A are two marks questions. These are to be answered in about 30 words each.

(vii) Question numbers 14 to 22 in Section-A are three marks questions. These are to be answered in about 50 words each.

(viii) Question numbers 23 to 25 in Section-A are five marks questions. These are to be answered in about 70 words each.

(ix) Question numbers 26 to 41 in Section-B are multiple choice questions based on practical skills. Each question is a one mark question. You are to select one most appropriate response out of the four provided to you.


Name the gas which is a major component of biogas. Write its chemical formula too.

A person suffering from an eye-defect uses lenses of power - 1D Name the defect he is suffering from and the nature of lens used. 1D

Name the organism(s) belonging to fourth trophic level in the food chain comprising of: Snakes, Insects, Frogs, Plants, Hawks

Name the chemical compound which depletes ozone layer.

Mention any two trends exhibited by elements when we go from left to right across the period of periodic table.

“Elements in Periodic Table show periodicity of properties” List any four such properties.

What is meant by DNA copying? Mention its importance in reproduction?

Write two advantages of vegetative propagation?

What is minimum number of rays required for locating the image formed by a concave mirror for an object? Draw a ray diagram to show the formation of a virtual image by a concave mirror.

10 An old person is unable to see clearly nearby object as well as distant objects

(i) What defect of vision is he suffering from?

(ii) What kind of lens will be required to see clearly the nearby as well as distant objects? Give reasons?

Please refer to attached file for CBSE Class 10 Science Question Paper SA2 2012 (1)


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