NEET Physics Kinetic Interpretation of Temperature Assertion Reason Question
Assertion (A): At the same temperature, lighter gas molecules have higher root mean square speeds compared to heavier gas molecules. | Reason (R): The root mean square speed is inversely proportional to the square root of the molecular mass of the gas.
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
The kinetic interpretation of temperature shows that at the same temperature, the root mean square speed is determined by the formula , where is the molecular mass. Thus, lighter molecules indeed have higher rms speeds, and this relationship is correctly explained by the reason.
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