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Theory of Panspermia and Chemical Evolution

What are the ...

Question

What are the two main gases present in air?

A

Nitrogen, Oxygen

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B

Oxygen, carbon dioxide

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C

Hydrogen, Carbon dioxide

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D

Helium,Xeon

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Solution

The correct option is A
Nitrogen, Oxygen

Air comprises of many gases, but Nitrogen and Oxygen constitute more than 90% of air. Air contains 78% nitrogen and 21% oxygen.

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