1.

At room temperature, the rms speed of the molecules of a certain diatomic gas is found to be 1920 m s^(-1). The gas is

Answer»

`H_(2)`
`F_(2)`
`O_(2)`
`Cl_(2)`

Solution :For diatomic gas, `T=27^(@)C`
As `v_(rms)=1920ms^(-1)=sqrt((3RT)/(M))=sqrt((3xx8.31xx300)/(M))`
`therefore M=2xx10^(-3)kg=2g`
It is hydrogen gas.


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