NEET Physics Kinetic Interpretation of Temperature Assertion Reason Question
Assertion (A): At a given temperature, lighter gas molecules move faster than heavier ones. | Reason (R): The root mean square speed of gas molecules is inversely proportional to the square root of their molecular mass.
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 root mean square speed is given by v_rms = sqrt(3k_B T/m), which shows that lighter molecules have higher speeds at the same temperature, explaining the assertion.
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