Question

Depletion of ozone layer is due to _______.

• A. Oxides of nitrogen
• B. Oxides of carbon
• C. Oxides of sulphur
• D. None of the above

Answer 1

The correct option is A Oxides of nitrogen

Oxides of nitrogen find their way to the environment when they are released from the fertilizers, farms, combustion of coal etc. These bear a similarity to the paraffinated halogens like the chlorofluorocarbons when they reach the stratosphere of the atmosphere. They get unstable when exposed to the UV rays and the reactive nitrogen atom recs with the ozone to form the nitrogen dioxide and the diatomic oxygen molecule, similar to the reaction catalysed by the CFCs which release reactive chlorine that break down the ozone.

Hence, the correct answer is 'Oxides of nitrogen'.