Q83
The most abundant constituent of atmospheric air is :
A.
Carbon
B.
Hydrogen
C.
Oxygen
D.
Nitrogen
AnswerAnswer: Option D
Solution
Answer: Option D
Solution:
Air is the name given to the atmosphere used in breathing and photosynthesis. Dry air contains roughly (by volume) 78.09% nitrogen, 20.95% oxygen, 0.93% argon, 0.039% carbon dioxide, and small amounts of other gases.