Question

List two forms of oxygenfound in atmosphere and name the process by which- oxygen from the atmosphere is used up and oxygen is returned to the atmosphere

Answer 1

Heya friend!!
Rajdeep here....

Oxygen in the atmosphere is found in two forms:

1. O2, which is a diatomic molecule containing 2 oxygen (O) atoms.
2. O3, which is an alloptrope of O2, containing 3 O atoms.

Now, oxygen is used by all living organisms. It is taken in (inhaled) by all animals for anabolic and catabolic processes in their body.

Carbon dioxide is exhaled by the animals which help the plant in carrying out photosynthesis. During photosynthesis, water is split to form Hydrogen ions, electrons and oxygen. This oxygen is given out in the atmosphere as molecular oxygen.

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