Subject :NSO Class : Class 4
What percentage of air comprises of nitrogen?
A21%
B< 1%
C78%
D81%
Ans 1:
Class : Class 7
Ans 2: (Master Answer)
Class : Class 1
C
Air contains approximately 78% nitrogen, 21% oxygen, 0.9% argon, 0.04% carbon dioxide, and small amounts of other gases.