Q. 14.3( 3 Votes )

Write down the composition of air.

Answer :

Air contains 78% nitrogen, 21% oxygen, 0.004% of carbon dioxide and small percentage of other gases. Amount of water vapour in the air varies with temperature. At 30 degree Celsius, air can contain 4% of water vapour, whereas at -40 degree Celsius, air cannot hold more than 0.2% water vapour.


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