Question

Give Reason:

Nitrogen and oxygen are called permanent gases of the atmosphere.

Answer 1

1. The atmosphere is a mixture of gases, water vapor, and dust particles in different proportions.
2. Nitrogen (78%) and oxygen (21 %) are permanent gases in the atmosphere.
3. They constitute 99% of the total composition.
4. Their percentages always remain the same without any change. Therefore nitrogen and oxygen are called permanent gases of the atmosphere.