Question

A source of non-biological oxygen is

• A. Photodissociation
• B. Photolysis
• C. Formation of fats from carbohydrates
• D. Both B and C

Answer 1

The correct option is A Photodissociation

The biological oxygen is released as the by-product of photosynthesis when the photolysis of water occurs. It does not cause any environmental loss, rather, it is responsible for keeping the life sustained on the earth. The non-biological source is the stratospheric photodissociation of gases like CFCs, HFCs, etc. that release the reactive chlorine by the activity of UV rays. This reactive chlorine reacts with the stratospheric ozone to release the diatomic oxygen and reactive oxygen. This is harmful because it breakdown the ozone layer.

Hence, the correct answer is 'Photodissociation'