1.

Which of following statements are correctA. Average velocity of molecules of a gas in a container is zeroB. All molecules in a gas are moving with the same speedC. If an open container is heated from 300 K to 400 K the fraction of air which goes out with respect to originally present is `1/4`D. If compressibility factor of a gas at STP is less than unity then its molar volume is less than 22.4 L at STP

Answer» Correct Answer - A,C,D
(C )`n_1T_1=n_2T_2`
`nxx300=n_2xx400`
`n_2=3/4n`
excape out=`(n-3/4n)/n=1/4`
(D)`(PV)/(RT)lt1`
`Zlt1`
Molar volume is less than 22.4 lit. at STP.


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