Question: Which of the following statements is true regarding the mean free path of gas molecules?

Options:

1. It increases with increasing temperature.
2. It decreases with increasing pressure.
3. It is independent of the size of the gas molecules.
4. It is constant for all gases.

Correct Answer: It decreases with increasing pressure.

Solution:

The mean free path decreases with increasing pressure because more molecules are present in a given volume, leading to more frequent collisions.