Which gas has the highest percentage in the air?

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Oxygen

Carbon dioxide

Noble gases

Nitrogen

answer is D.

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Detailed Solution

Nitrogen has the highest percentage in the air.
Air is a mixture of several gases. Air contains mainly nitrogen and oxygen. It also contains
carbon dioxide, noble gases, water vapour, dust particles and traces of other gases. Air
contains about 78% nitrogen, 21% oxygen, and the remaining 1% includes gases such as dust, smoke, water vapour, argon, carbon dioxide, and a small number of other gases. So, nitrogen is present in the highest percentage in the air.

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