and 
are root mean square, average and most probable speeds of molecules of a gas obeying Maxwellian velocity distribution. Which of the following statements is correct?
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
B
Root mean square speed. The root mean square speed is used to measure the velocity of particles in a gas. It is given by
where 
is molar mass and 
is gas constant, 
is temperature.
Most probable speed 
, is the speed most likely to be possessed by any molecule in the system.
whereas mean speed is
(3)
From Eqs. (1), (2) and (3), we conclude that
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