Assertion: Poisson ratio of atmospheric gases is approximately equal to `1.4`.
Reason: Gases present in atomosphere are mainly diatomic.

The poisson's ratio for inert gases is:

Assertion: The Poisson's ratio for diatomic gases is more than for monoatomic gases. Reason: Diatomic gases possess more degree of freedom.

What are the gases, mainly present in the air ?

In which part of atmosphere, and most of the atmospheric gases are present in troposphere.

Which of the noble gases is not present in the atmosphere?