1.

At room temperature (27^(@)C) the r.m.s speed of the molecules of a certain diatomic gas is found to be 1920 ms^(-1). The gas is:

Answer»

`O_(2)`
`H_(2)`
`F_(2)`
`CI_(2)`

Solution :`v_(rms) =sqrt((3RT)/(M)) rArr v_(rms)^(2) =(3RT)/(M)`
`M=(3xx8 cdot 32xx300)/((1920)^(2))=2xx10^(-3) kg`
`M=2g.`
Thus, gas is HYDROGEN
Hence, CORRECT CHOICE is (B).


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