MEDIUMMCQ SINGLEIChO (Chemistry Olympiad)Physical ChemistryGaseous statePrevious Year Questions

Given, RMS velocity of hydrogen at 300 K is 1.9 × 103 m/s. The RMS velocity of oxygen at 1200 K will be (OJEE 2010)

A.7.6 × 103 m/s

B.3.8 × 103 m/s

C.0.95 × 103 m/s✓ Correct

D.0.475 × 103 m/s

Explanation

3 2 3 300 ( ) 1.9 10 / 2 rms R v H m s x x Gaseous State 28 2 2 3 1200 1 3 300 1 ( ) ( ) 32 2 2 2 rms rms R R v O v H x x x 3 3 1 (1.9 10 ) / 0.95 10 / 2 m s m s x x

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