CBSE Class 10 Science Question Paper 2013 Outside Delhi Set 02

CBSE Class 10 Science Outside Delhi Question Paper 2013 (2). 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.

SCIENCE AND TECHNOLOGY (Theory)

Section-A

1. Biological reactions in our body depend on the presence of biocatalysts. What name is given to these catalysts ? How is their activity influenced by changes in temperature ? 

2. Name two metals both of which are very ductile as well as very malleable. 

3. Write the chemical equation to represent the reaction taking place when copper oxide is heated in a stream of hydrogen. 

4. What are the values of (i) the angle of incidence, and (ii) the angle of reflection for normal incidence on a plane mirror surface ? 

5. A wire of resistance 10 ohm is bent in the form of a closed circle. What is the effective resistance between the two points at the ends of any diameter of the circle ? 

6. What happens when crystals of washing soda are left open in dry air ? What is this change named as ? Name two industries based on use of washing soda. 

7. "Sulphuric acid is a dibasic acid." Write two reaction equations to justify this statement and name the reaction products in the two cases.  

8. Explain the principle involved in the launching of artificial satellites. 

9. Light enters from air into a glass plate which has a refractive index of 1.50. Calculate the speed of light in glass. The speed of light in air is 3.0×108 ms---1. 

10. Distingusih between 'prompt', 'delayed' and 'spontaneous' fissions of nuclei. 

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