MEDIUMMCQ SINGLEIChO (Chemistry Olympiad)Physical ChemistryGaseous statePrevious Year Questions

If the temperature changes from 27°C to 127°c relative percentage change in RMS velocity is (OJEE 2010)

A.1.56

B.2.56

C.15.6✓ Correct

D.82.4

Explanation

3 rms RT v M for a particular gas, M is constant, rms v T rms rms v T v x T >> x (where, 3 / x R M ) So, at 27oC (400 K), 400 20 rms v x x Percentage increase (20 17.3 ) 100 15.6% 17.3 x x x x

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