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Chem – Ch 12

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1

Which disease is caused by contaminated water?

2

Which parameter indicates the amount of salts dissolved in water?

3

Which method is used to kill harmful microorganisms in water?

4

Water pollution can be reduced by:

5

Permanent hardness of water is caused by:

6

Soft water is suitable for:

7

Eutrophication results in:

8

Dissolved oxygen in water is essential for:

9

Which organism causes cholera?

10

Hard water does not form lather easily with:

11

Which disease is NOT water-borne?

12

Which salt causes temporary hardness?

13

Which of the following is a safe drinking water indicator?

14

Water pollution mainly affects:

15

Which activity increases water pollution?

16

Which metal is commonly found as a toxic water pollutant?

17

Hardness of water is mainly due to the presence of:

18

Which indicator shows the acidity or alkalinity of water?

19

Which property of water helps in temperature regulation?

20

Which practice helps prevent water-borne diseases?

21

Which parameter indicates the clarity of water?

22

The chemical formula of water is:

23

Which of the following is a chemical water pollutant?

24

Clean water is essential mainly for:

25

Which of the following is a physical pollutant of water?

26

Typhoid is a:

27

Which method is used to remove temporary hardness?

28

Which process uses resin to soften water?

29

Pure water has a pH value of:

30

Which household method improves drinking water quality?

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