Which of the following gases have the highest composition in air?

Nitrogen

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Hydrogen

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Oxygen

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Argon

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Solution

The correct option is A Nitrogen
Air is mixture of different gases, water vapours and dust particles.
Nitrogen makes up 78% of the air.
Oxygen gas takes up 21% of the air.
Water vapour, dust particles, and other gases including carbon dioxide, argon constitute 1% of the air.
0.04% of the air is carbon dioxide.
So, nitrogen has the highest composition in air.

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