Question

Which one of the following is held responsible for the depletion of earth's ozone layer?

• A. Carbon dioxide
• B. Sulphuric acid
• C. Chlorofluorocarbons
• D. Smoke

Answer 1

The correct option is C

Chlorofluorocarbons

The correct option is C.

Explanation of the correct option :

1. Chlorofluorocarbons (CFCs) are type of synthetic chemicals used widely in air conditioners, refrigerators and in fire extinguishers.
2. One molecule of chlorofluorocarbon can damage 1,00,000 molecules of ozone. The depletion of ozone in the stratosphere occurs due to reaction between ozone and CFCs.

Explanation of the incorrect option:

Option A:

Carbon dioxide causes air pollution and global warming.

Option B:

Sulphuric acid causes acid rain.

Option D:

Smoke causes air pollution along with smog.

Final answer: Chlorofluorocarbons (CFCs) is responsible for the depletion of earth's ozone layer.