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Q.

The percentage of nitrogen in air is?

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a

21 %

b

0.1 %

c

54 %

d

78 % 

answer is D.

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Detailed Solution

●        Air is a mixture of different gasses.
●        The Earth's atmosphere is made up of about 78 percent nitrogen and 21 percent oxygen.
●        Other gasses like hydrogen, neon and carbon dioxide are also present in very small amounts in the air.
 
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