Question

Q. Which of the following pairs is/are correctly matched?

Sl. No.	Pollutants Major	Source
1.	Chlorofluorocarbons (CFC)	Air Conditioner
2.	SO2	Pulverized coal burning in the thermal power industry
3.	Lead	Gasoline and Aviation Fuel

Select the correct option using the codes given below:

• A. 1 and 2 only
• B. 2 and 3 only
• C. 1 and 3 only
• D. 1, 2 and 3

Answer 1

The correct option is D 1, 2 and 3

Explanation:

All pairs are correctly matched

Chlorofluorocarbons (CFC)

• These are gases that are released mainly from air-conditioning systems and refrigeration

Sulphur dioxide (SO₂):

• It is a gas produced from burning coal, mainly in thermal power plants.
• Some industrial processes, such as the production of paper and smelting of metals, produce Sulphur dioxide. But the major source in India is the burning of pulverized coal in thermal power plants.

Lead:

• It is present in leaded petrol, diesel, aviation fuel, lead batteries, paints, hair dye products, etc.
• Lead affects children in particular.
• It can cause nervous system damage and digestive problems and, in some cases, cause cancer.