Gas that constitutes nearly 21% of air by volume is .

carbon dioxide

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nitrogen

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oxygen

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Solution

The correct option is C oxygen
Air is a mixture of several gases, water vapour and dust particles. It mainly consists of gases namely nitrogen (78%), oxygen (21%), argon (0.9%), carbon-dioxide (0.03%) and water vapour.

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Similar questions

__________ is the second largest component of air, constituting almost 21% volume of air.

Nitrogen constitutes ____of the air by volume.

Carbon dioxide constitutes about ________ % by volume in air.

(C_{v} = \frac{5 R}{2})

0^{\circ} C .

V

13200 J

V

(1 a t m = 10^{5} N / m^{2})

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