What is the correct percentage by volume of various gases in Earth's atmosphere?

Question

Question

This question was previously asked in

SSC CGL 2022 Tier-I Official Paper (Held On : 13 Dec 2022 Shift 4)

20.95% nitrogen, 78.09% oxygen, and 0.04% carbon dioxide and other greenhouse gases.
10.95% nitrogen, 88.09% oxygen, and 0.09% carbon dioxide and other greenhouse gases.
10.95% nitrogen, 78.09% oxygen, and 0.03% carbon dioxide and other greenhouse gases.
78% nitrogen, 21% oxygen, and 0.03% carbon dioxide and other greenhouse gases.

Answer 1

The correct answer is 78% nitrogen, 21% oxygen, and 0.03% carbon dioxide and other greenhouse gases.

Key Points

Composition of the atmosphere:
The air we take in while breathing is actually a mixture of many gases.
Nitrogen and oxygen are two gases that make up the bulk of the atmosphere.
Carbon dioxide, helium, ozone, argon, and hydrogen are found in lesser quantities.
Apart from these gases, tiny dust particles are also present in the air.
These dust particles present in the air are commonly referred to as aerosols.

Additional Information

The atmospheric composition of gases by volume is as follows:

Permanent Gases of the Atmosphere
Constituent	Per cent by Volume
Nitrogen (N2)	78.084
Oxygen (O2)	20.946
Argon (Ar)	0.934
Carbon dioxide (CO2)	0.036
Neon (Ne)	0.00182
Helium (He)	0.000524
Krypton (Kr)	0.000114
Hydrogen (H2)	0.00005