Percentage of nitrogen and oxygen in the air is ____ respectively.

70% and 30% approx

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80% and 20% approx

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78% and 21% approx

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60% and 40% approx

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Solution

The correct option is C
78% and 21% approx

Air is a mixture of many gases. It is primarily composed of approx 78% nitrogen and 21% oxygen with only small concentration of other gases such as carbon dioxide and argon.

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