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Air Pollution

What is the c...

Question

What is the composition of oxygen in the atmosphere?

A

78%

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B

21%

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C

1%

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D

6%

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Solution

The correct option is B 21%
Oxygen comprises of 21% of the earth's atmosphere. Nitrogen makes up 78%, and the remaining 1% comprises of gases like argon(0.9%), along with traces of carbon dioxide, methane, hydrogen, helium, and water vapour.

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