Question

Which of the following play significant role in depletion of ozone layer?

• A. Nitrogen dioxide
• B. Carbon dioxide
• C. Sulphur dioxide
• D. Chlorofluorocarbon

Answer 1

Answer: (D)

The correct option will be chlorofluorocarbon.

• Among the given options, carbon dioxide, sulphur dioxide and nitrogen dioxide are responsible for air pollution and global warming.
• While chlorofluorocarbons (CFCs) and other halogenated ozone-depleting substances (ODS) are mainly responsible for ozone depletion.
• CFCs drift slowly upward to the stratosphere, where they are broken up by ultraviolet radiation, releasing chlorine atoms, which are able to destroy ozone molecules as shown in the figure.