Acid rain is caused by increases in the atmospheric concentration of?

1. $S{O}_2$ $and$ $N{O}_2$

2. $S{O}_3$ $and$ $CO$

3. $C{O}_2$ $and$ $CO$

4. $O_3$ $and$ $dust$

A scrubber in the exhaust of a chemical industrial plant removes:

1. Gases like sulphur dioxide

2. Particulate matter of the size 5 micrometer or above

3. Gases like ozone and methane

4. Particulate matter of the size 2.5 micrometer or less

dB is a standard abbreviation used for the quantitative expression of:

1. the density of bacteria in a medium

2. a particular pollutant

3. the dominant Bacillus in a culture

4. a certain pesticide

Steps taken by the Government of India to control air pollution include:

In a coal fired power plant, electrostatic precipitators are installed to control the emission of:

1. $S{O}_2$

2. $N{O}_x$

3. SPM

4. CO

Photochemical smog pollution does not contain:

1. ozone

2. nitrogen dioxide

3. carbon dioxide

4. PAN (Peroxy Acyl Nitrate)