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The density of helium is 0.1782 g per li...

The density of helium is 0.1782 g per litre at N.T.P. Its density at `27^(@)` C and 740mm Hg will be

A

`(0.1782 xx300xx760)/(273xx740)`g per litre

B

`(0.1782 xx300xx740)/(273xx760)`g per litre

C

`(0.1782 xx273xx740)/(300xx740)`g per litre

D

`(0.1782 xx273xx740)/(300xx760)`g per litre

Text Solution

Verified by Experts

The correct Answer is:
D
d=`(PM)/(RT),`
`(d_(2))/(d_(1))=P_(2)/T_(2)xxT_(1)/P_(1),(d_(2))/(0.1782)=(740xx273)/(300xx760)`
`d_(2)=(0.1782xx273xx740)/(300xx760)" ""g"L^(-1)`
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