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At room temperature, the rms speed of th...

At room temperature, the rms speed of the molecules of a certain diatomic gas is found to be `1930 m//s`. The gas is

A

`H_(2)`

B

`F_(2)`

C

`O_(2)`

D

`Cl_(2)`

Text Solution

Verified by Experts

The correct Answer is:
A
`v_(rms)= sqrt((3RT)/(M)) rArrM=(3RT)/(v_(rms)^(2))`
`therefore" "M=(3xx8.3xx300)/((1920)^(2))=2xx10^(-3)kg=2g`
`rArr` Gas id hydrogen.
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