Vapour pressure of pure `A(p_(A)^(@))=100` mm Hg
Vapour pressure of pure `B(p_(B)^(@))= 150` mm Hg
2 mol of liquid A and 3 mol of liquid B are mixed to form an ideal solution. The vapour pressure of solution will be:

Options

A. 135 mm
B. 130 mm
C. 140 mm
D. 145 mm

Answer

B

Explanation

`x_(A)=(2)/(5),x_(B)=(3)/(5)`
`p=p_(A)^(0)x_(A)+p_(B)^(0)x_(B)`
`=100xx(2)/(5)+150xx(3)/(5)=4090=130`]