Match correctly the following and choose the correct option :

A.	Environment Protection Act	1.	1974
B.	Air Prevention and Control of Pollution Act	2.	1987
C.	Water Act	3.	1986
D.	Amendment of Air Act to include noise	4.	1981

The correct matches are

	A	B	C	D
1.	3	4	1	2
2.	1	3	2	4
3.	4	1	2	3
4.	3	4	2	1

Q.15 Catalytic converters are fitted into automobiles to reduce the emission of harmful gases. Catalytic converters change unburnt hydrocarbons into

1. carbon dioxide and water

2. carbon mono oxide

3. methane

4. carbon dioxide and methane

Why is it necessary to remove sulfur from petroleum products?

Q.17 Which one of the following impurities is easiest to remove from waste
water?

1. Bacteria

2. Colloids

3. Dissolved solids

4. Suspended solids

Which one of the following diseases is not due to contamination of water?

1. Hepatitis-B

2. Jaundice

3. Cholera

4. Typhoid

Nuisance growth of aquatic plants and bloom-forming algae in natural
water is generally due to high concentrations of

1. carbon

2. sulfur

3. calcium

4. phosphorus

Q.20 Algal blooms impart a distinct color to water due to

1. their pigments

2. excretion of colored substances

3. formation of colored chemicals in water facilitated by the physiological degradation of algae

4. absorption of light by algal cell wall

Q. 21 Match the items in column I and column II and choose the correct option.

The correct matches are

Q.22 In the textbook you same across the three-mile island and Chernobyl
disasters associated with accidental leakage of radioactive wastes. In
India we had the Bhopal gas tragedy. It is associated with which of the
following

1. ${\mathrm{CO}}_2$

2. Methyl isocyanate

3.. CFC's

4. Methyl cyanate

Q.13 The major source of noise pollution, worldwide is due to

1. office equipment

2. transport system

3.sugar, textile, and paper industries

4. oil refineries and thermal power plants