Question

Which gas is responsible for the depletion of the ozone layer?
A. Carbon dioxide
B. Methane
C. Chlorofluorocarbon
D. Sulphur dioxide

Answer 1

Hint: Ozone layer present in stratosphere. It protects the earth from various types of sun rays which cause a lot of damage to the living things on the earth. Some chemicals which release into the environment and cause damage to the ozone layer.

Complete answer:
- In the question it is asked to find the gas which is responsible for the depletion of the ozone layer among the given options.
- Coming to the given options, option A. Carbon dioxide, it is the gas released by the motor vehicles due to the incomplete burning of the fuels. Carbon dioxide causes global warming, not the depletion of the ozone layer. So, option A is incorrect.
- Coming to option B, Methane. It is a gas present in the atmosphere and called greenhouse gas helps the earth to maintain the suitable temperature for the survival of man-kind. So, option B is incorrect.
- Coming to option C, Chlorofluorocarbon. This is the gas released from the air conditioners and reaches the ozone layer because of its light weight and causes damage to the ozone layer called depletion. Chlorofluorocarbons through free radical formation deplete the ozone layer. So, the correct option is C.
- Coming to option D, Sulphur dioxide. It is gas that causes acid rain after mixing with rain water. So, option D is incorrect.
- Therefore Chlorofluorocarbon causes the depletion of the ozone layer.

So, the correct option is C.

Note:
Chlorofluorocarbon reaches the ozone layer and forms free radicals by taking the energy from the sunlight and releases chlorine free radicals. The formed chlorine free radicals through chain reaction deplete the ozone layer.