1.

Which of following statements are correct

Answer»

Average VELOCITY of molecules of a gas in a container is zero
All molecules in a gas are moving with the same speed
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`
If compressibility factor of a gas at STP is less than unity then its MOLAR volume is less than 22.4 L at STP

Solution :(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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