The vapour pressure of the solution of two liquids A`(P^@=80mm)` and B`(P^@=120mm)` is found to `100mm` when `x_(A)=0.4`. The result shows that

Options

A. solution exhibits ideal behaviour
B. solution shows positive deviations
C. solution shows negative deviations
D. solution will show positive deviations for lower concentration and negative deviations for higher concentrations.

Answer

C

Explanation

`P_("total")=0.4xx80+0.6xx120`
`=104 gt 100` mm of Hg.