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Maxwell's Distribution of Speeds

At STP, the o...

Question

At STP, the order of root mean square speed of molecules $H_{2}, N_{2}, O_{2}$ and $H B r$ is:

A

H_{2} > N_{2} > O_{2} > H B r

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B

H B r > O_{2} > N_{2} > H_{2}

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C

H B r > H_{2} > O_{2} > N_{2}

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D

N_{2} > O_{2} > H_{2} > H B r

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Solution

The correct option is A $H_{2} > N_{2} > O_{2} > H B r$
$R M S v e l o c i t y α \frac{1}{M o l e c u l a r w e i g h t}$
So, $H B r < O_{2} < N_{2} < H_{2}$
Option $A$ is correct.

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