Question

Match column A with column B and choose the correct option.

Column A	Column B
1. Gaseous oxide	a. Dust
2. Particulate matter	b. VOC
3. Organic chemicals	c. $S{O}_2$

• A. 1 - a, 2 - c, 3 - b
• B. 1 - b, 2 - a, 3 - c
• C. 1 - c, 2 - b, 3 - a
• D. 1 - c, 2 - a, 3 -b

Answer 1

The correct option is D 1 - c, 2 - a, 3 -b

Air pollution can be defined as any undesirable change in the physical, chemical or biological characteristics of air.

Agents which cause these undesirable changes are referred to as pollutants.

Air pollutants can be released into the atmosphere from

• natural sources such as volcanic eruptions, pollens released by flowering plants, etc.
• anthropogenic sources (due to human activities) such as exhaust from automobiles, factories, cigarette smoke, etc.

Air pollutants can be -

• Gaseous in nature such as oxides of nitrogen, oxides of sulphur (SO₂, SO3), carbon monoxide, carbon dioxide, organic chemicals (hydrocarbons, volatile organic compounds or VOCs) etc.
• Particulate in nature such as dust, soot, etc.

Column A	Column B
1. Gaseous oxide	c. $S{O}_2$
2. Particulate matter	a. Dust
3. Organic chemicals	b. VOC