The vapour pressure of pure `CHCl_(3) and CH_(2)Cl_(2)` are 200 ad 41.5 atm respectively. The weight of `CHCl_(3) and CH_(2)Cl_(2)` are respectively 11.9 g and 17 gm. The vapour pressure of solution will be

Options

A. 80.5
B. 79.5
C. 94.3
D. 105.5

Answer

C

Explanation

`P_(CHCl_(3))^(0)=200atm" "P_(CH_(3)Cl_(2))^(0)=41.5atm`
`n=(11.9)/(119)" "n=(17)/(85)`
`=1" "=2`
`P_(T)=P_(A)^(0)X_(A)+P_(B)^(0)X_(B)`
`=200xx(0.1)/(3)" "+(41.5xx0.2)/(.3)`
=94.33