General Knowledge : Environment Science : Discussion


How much percentage of nitrogen consist in Earth's Atmosphere?

A. 25%.
B. 12%.
C. 92%.
D. 78%.

Answer: Option D


Earth atmosphere consists of a layer of gases. It is known as air. The composition of Dry air contains; 78.09% of Nitrogen(N2), 20.95% of Oxygen (O2), 0.93% of Argon (Ar) and 0.04% of Carbon dioxide(CO2).

Also, it contains small amounts of other gases like; helium, neon, krypton, hydrogen and water vapour.



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