O₂ content in atmospheric air on weight basis is Options: A . &nbsp21 % B . &nbsp23 % C . &nbsp30 % D . &nbsp40 %

O₂ content in atmospheric air on weight basis is

Question

O₂ content in atmospheric air on weight basis is

Options:

A . 21 %

B . 23 %

C . 30 %

D . 40 %

Answer: Option B

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