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Question

Percentage of oxygen in atmosphere of earth is :

A
42.94%
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B
20.94%
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C
35.94%
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D
25.94%
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Solution

The correct option is C 20.94%
By volume, dry air contains 78.09% nitrogen, 20.94% oxygen, 0.93% argon, 0.04% carbon dioxide, and small amounts of other gases.
713780_634884_ans_6e5c0f2a14264a3b844c8f6086852134.jpg

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