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KCET2013ChemistryStates of Matter

Which of the following gases has the highest value of RMS velocity at 298 ~K ?

Options

  1. ACH ₄
  2. BCO
  3. CCl ₂
  4. DCO ₂

Correct answer

A. CH ₄

Step-by-step solution

RMS-velocity of a gas v_ rms = 3 R T M Hence, higher the molecular weigth of a gas, lower will be its RMS-velocity v_ rms 1 M CH ₄ (mol. weight =16 ) has highest RMS-velocity.

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