MEDIUMMCQ SINGLEIChO (Chemistry Olympiad)Physical ChemistryGaseous statePrevious Year Questions

At what temperature, the RMS velocity of gas present at 50°C will be doubled? (OJEE 2010)

A.626K

B.1019K

C.200°C

D.1019oC✓ Correct

Explanation

3 rms rms RT v or V T M where, T is in Kelvin scale. For RMS velocity to be doubled, T in Kelvin scale must be raised 4 time. So, it should be 4 × (50 + 273) = 1292 K = (1292 - 273)oC = 1019oC

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