CBSE Class 10 Science Sample Paper Set H

SECTION-A

1 Name the process used by single-celled organisms for taking in food, exchange of gases or removal of wastes.

2 Write the SI unit of Resistance. 

3 What is a solar panel ? 

4 A student performed the following reactions :

   (i) CuSO₄ + Fe → FeSO₄ + Cu

   (ii) FeSO₄ + Zn →  ZnSO₄ + Fe

   (iii) 2AgNO₃ + Cu →  Cu (NO₃)₂ + 2Ag

State the conclusions drawn from each of the above reaction and hence arrange Cu, Fe, Ag and Zn in the decreasing order of their reactivity.

5 Write a chemical equation to describe how baking soda is produced on a large scale. Also write chemical name of the products obtained.

6 Write two differences between the response of the plants and response of the animals to stimuli.

7 Write chemical equations for the following reactions :

   (i) a piece of calcium metal is dropped in water.

   (ii) steam is passed over red hot iron.

   (iii) Zinc sulphide is heated in air.

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