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The most probable speed of gas molecules is the speed

  1. Apossessed by the maximum fraction of molecules
  2. Bequal to the average of all molecular speeds
  3. Cequal to the square root of the mean of squared speeds
  4. Dpossessed by every molecule

Answer: A

The most probable speed corresponds to the maximum of the Maxwell speed distribution curve, i.e. the speed possessed by the largest fraction of molecules. It is less than both the average and the rms speed.
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