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According to one of the most widely acce...

According to one of the most widely accepted theories, earth's atmosphere before origin of life was.

A

oxidising

B

oxidising along with `H_(2)`

C

reducing with free `O_(2)` in small amont

D

reducing with oxygen absent in `O_(2)` form.

Text Solution

Verified by Experts

The correct Answer is:
D
The atmosphere of earth before origin of life was strongly reducing (without free oxygen). At high temperature, free atoms combined to form molecules and simple inorganic compounds. Hydrogen, oxygen, carbon and itrogen could not exist in free state and thus combined variously either among themselves or like `CH_(4), NH_(3), H_(2)` and `H_(2)O` vapour.
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