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Chem – Chapter 11: Environmental Chemistry-Air + Ch 12

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1

Excess fertilizers in water bodies cause:

2

Excessive chloride in water indicates:

3

Which metal is commonly found as a toxic water pollutant?

4

Pure water has a pH value of:

5

Global warming is mainly caused by increase in:

6

The chemical formula of water is:

7

Acid rain mainly damages:

8

Nitrogen oxides are mainly released from:

9

Environmental chemistry mainly studies:

10

Which health problem is caused by increased UV radiation?

11

Which gas traps heat in the atmosphere?

12

Which gas is responsible for breathing?

13

Which layer of atmosphere is the coldest?

14

Which gas causes choking at high concentration?

15

Which pollutant causes irritation of eyes and lungs?

16

Which disease is NOT water-borne?

17

Which property makes water suitable for life?

18

The percentage of argon in air is approximately:

19

Which gas is NOT a greenhouse gas?

20

Which method is used to kill harmful microorganisms in water?

21

Ozone layer depletion increases:

22

Which method is used to remove permanent hardness?

23

Which of the following is a biological water pollutant?

24

Which practice helps prevent water-borne diseases?

25

Weather changes mainly occur in the:

26

Water has maximum density at:

27

Which gas is the major greenhouse gas?

28

Which method is used to remove temporary hardness?

29

Which activity increases water pollution?

30

Which state of water is less dense?

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