NEET Physics Kinetic Interpretation of Temperature Assertion Reason Question
Assertion (A): The root mean square speed of gas molecules is higher for lighter gases at the same temperature.
Reason (R): At the same temperature, all gases have the same average kinetic energy.
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 but R is true.
Correct Answer
Detailed Explanation
The root mean square (rms) speed depends on the mass of the molecules. Lighter molecules have higher rms speeds at the same temperature because they have the same average kinetic energy as heavier molecules, as indicated in the NCERT context.
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