1.

The root mean square velocity of hydrogen at S.T.P.is

Answer»

`1.8 XX 10^5 CM SEC^(-1)`
`3.6 xx 10^5 cm sec^(-1)`
`1.8 xx 10^10 cm sec^(-1)`
`1.8 xx 10^8 cm sec^(-1)`

ANSWER :A


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