MEDIUMMCQ SINGLEIChO (Chemistry Olympiad)Physical ChemistryGaseous stateMaxwell's distribution of molecular speeds

Which of the following gases would have the highest R.M.S. velocity at 25ºC ?

A.Oxygen

B.Carbon dioxide

C.Sulphur dioxide

D.Carbon monoxide✓ Correct

Explanation

3 rms RT V M (a) MW of 2 O 32 (b) MW of 2 CO 44 (c) MW of 2 SO 64 (d) MW of CO 28 As, root mean square velocity is inversely proportional to molecular weight. Hence, (d) would be the correct option.

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