Question

What is the composition of air ?

Answer 1

Air is a mixture of gases - 78 vol% nitrogenand 21 vol% oxygen - with traces of water vapor, carbon dioxide, argon, and variousother component

Answer 2

Air consists of the following major gases :-
1. Nitrogen- 78 %
2. Oxygen- 21 %
3. Other gases- 1 %

Other gases include carbon dioxide, argon, carbon monoxide, water vapours etc.