CBSE Class 10 Science Question Paper SA2 2012 (1)

CBSE Class 10 Science Question Paper SA2 2012 (1). Students can download the last year question papers using the link below. Free download of examination question papers with solutions. Last 10 year question papers should be practised to get better marks in examinations.

SUMMATIVE ASSESSMENT – II, 2012 

SCIENCE  Class – X 

Section-A

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

2 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

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

4 Name the chemical compound which depletes ozone layer.

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

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

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

8 Write two advantages of vegetative propagation?

9 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 click the link below to download pdf file of CBSE Class 10 Science Question Paper SA2 2012 (1)