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Q.

What is the percentage of molecular nitrogen by volume of the atmosphere?

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a

78%

b

84%

c

64%

d

68%

answer is C.

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Detailed Solution

Atmosphere is a layer of gases that surrounds the earth.It is made up of 78% nitrogen,21% oxygen,0.9% argon and 0.035%carbon dioxide and very small % of water vapour.

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