CBSE Class 10 Science Question Paper 2007 (2)

CBSE Class 10 Science Question Paper 2007 (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. Classify the following reactions into slow and fast reaction :

(i) Reaction between an acid and a base,

(ii) Rusting of iron. 

2. Give the names of the functional groups

(i) — CHO

|

(ii) — C=O 1

(i) — CHO

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(ii) — C=O

3. What is a Galaxy ?

4. What is the S.I. unit of electric potential ? 

5. (a) Give Arrhenius definition of an acid and a base.

    (b) Choose strong acid and strong base from the following :

     CH3COOH, NH4OH, KOH, HCl. 

     CH3COOH, NH4OH, KOH, HCl.

6. What is Tollen’s reagent ? What would you observe on heating Tollen’s reagent with formalin in a test tube ? 

7. Distinguish between polar and equatorial orbits for artificial satellites. Illustrate the two orbits on a diagram. 

8. An electric iron has a rating of 750 W, 220 V. Calculate

(i) current passing through it, and

(ii) its resistance, when in use. 

9. (Name the raw materials that are required for the manufacture of washing soda by Solvay Process. Describe the chemical reactions involved in the process. 

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