First slide

Kinetic theory of ideal gases

Question

Select the correct alternative

Easy

A

RMS speed can be greater than maximum speed of the molecules
B

RMS speed can be lesser than minimum speed of the molecules
C

RMS speed is dependent on temperature
D

At higher RMS speeds, particles tend to move in same direction

Solution

$v_{R M S} = \sqrt{\frac{3 R T}{M}},$ dependent on absolute temperature, T. Since it is an average, it is greater than least speed, and lesser than greatest speed.

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