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Molecular Speeds - Vrms, Vavg, Vmps

The ratio of ...

Question

The ratio of most probable velocity to average velocity is:

A

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B

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C

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D

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Solution

The correct option is A

$V_{m p} = \sqrt{\frac{2 R T}{M}} V_{a v} = \sqrt{\frac{8 R T}{π M}} \frac{V_{m p}}{V_{a v}} = \sqrt{\frac{2 R T}{M}} \times \sqrt{\frac{8 R T}{M}} = \frac{\sqrt{π}}{2}$

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Molecular Speeds - Vrms, Vavg, Vmps

Standard XII Chemistry

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