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In the distribution of molecular speeds ...

In the distribution of molecular speeds of a gas is as per the figure shown below, then the ratio of the most probale, the average, and the root mean square speeds, respectively, is

A

`1:1:1`

B

`1:1:1.224`

C

`1:1.128:1.224`

D

`1:1.128:1`

Text Solution

Verified by Experts

The correct Answer is:
B
Due to symmetrical graph given, the average value of velocities will be at the middle, symmetrical velocity which is also most probable velocity.
While calculating rms speed, we have to take average of square of speeds and its root. In square of speeds, higher speeds will give more contribution so the value will be more than the average value.
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