NEET Physics Mean Free Path Assertion Reason Question
Assertion (A): The mean free path of gas molecules increases as the density of the gas decreases. | Reason (R): The mean free path is inversely proportional to the number density of gas molecules.
Both A and R are true, and R is the correct explanation of A.
Both A and R are true, but R is not the correct explanation of A.
A is true, but R is false.
A is false.
Correct Answer
Detailed Explanation
In kinetic theory, the mean free path is inversely proportional to the number density of gas molecules. As density decreases, number density decreases, leading to an increase in mean free path.
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