Water-A Precious Resource Worksheet-1

Water-A Precious Resource Worksheet-1

1. Air coolers are recommended in which of the following areas?

(a) Very humid areas

(b) Desert areas

(c) Both of these

2. Which of the following is not the property of pure water?

(a) It is colourless and odourless liquid

(b) Pure water has minimum density at 4ºC

(c) Pure water is the poor conductor of electricity

(d) Water shows the phenomena of anomalous expansion

3. Why do fishes die in shallow ponds in summer?

(a) The solubility of air in water decreases with increase in temperature so fishes do not get sufficient amount of oxygen

(b) The solubility of air in water increases with increases in temperature so fishes get excess of oxygen, they get suffocated

(c) The temperature of the water rises and fish cannot tolerate high temperature

4. Which of the following is NOT true about icebergs?

(a) One tenth of the iceberg is over the surface

(b) Nine tenth of the iceberg is over the surface

(c) Entire iceberg floats over the surface

(d) Its snow covered mountain

5. The solubility of common salt is:

(a) Less than sugar

(b) More than sugar

(c) Same as that of sugar

6. Why steam is used in driving steam engines rather than any other hot gas?

(a) Steam can carry large amount of heat per gram compared to any other substance

(b) Using steam is economical

(c) Water has low specific heat capacity so it takes large amount of energy to get heated up and supplies large amount of steam

7. On cooling, volume of the water:

(a) Increases

(b) Decreases

(c) First increases and then decreases

(d) First decreases and then increases

8. Water in the seas is fit for

(a) Human consumption            (b) Agriculture purposes

(c) Industrial use                          (d) None of these

9. Which of the following has groundwater as its source?

(a) Tube well                                 (b) Handpump

(c) Borewell                                   (d) All of these

10. Which of the following will not lead to water scarcity?

(a) Industrialization                    (b) Agriculture practices

(c) Over population                     (d) Rainwater harvesting

11. When is ‘World Water Day’ celebrated?

(a) 2^nd March                                (b) 5^th June

(c) 22^nd March                              (d) 1^st May

Answer Key:

1. (b)
2. (b)
3. (a)
4. (a)
5. (a)
6. (a)
7. (a)
8. (d)
9. (d)
10. (d)
11. (c)