Question

The major constituent of the atmosphere by percent is

a) Nitrogen

b) Oxygen

c) Carbon dioxide

d) None of these​

Answer 1

Answer:

Below a height of about 86 kilometers, the three main gaseous elements, which together account for about 99.9% of the total atmosphere, exist in essentially constant proportion to the total: nitrogen comprises 78% of air by volume, oxygen comprises 21% of air by volume, and argon comprises another 0.9%.

Answer 2

Nitrogen is the major constituent of atmosphere (78%).