Density of a gas is found to be `5.46//dm^(3)` at `27^(@)C` at 2 bar pressure What will be its density at `STP` ? .

Options

A. 6 gm/I
B. 8 gm/I
C. 2.75 gm/I
D. 1.5 gm/I

Answer

C

Explanation

`P = ((W)/(V)) (RT)/(M)`
`(P_(1)M_(1))/(d_(1) T_(1)) = (P_(2) M_(2))/(d_(2) T_(2)) " " ( because M_(1) = M_(2))`
`(2)/(5.46 xx 300) = (1)/(d_(2) xx 273)`
`d_(2) = (5.46 xx 300)/(2 xx 298) = 2.75 gm//dm^(3)`