1 mole of liquid A and 9 moles of liquid B are mixed to form a solution. If `"P"_("B")^(@)=400"mm"` of Hg and `"P"_("A")^(@)=20 "mm"` of Hg at a temperature 'T' and normal boiling point of liquid B is 300K then answer the questions that follow.
Given data: `"K"_("b")=2.7"K kg mol"^(-1),` Molar mass of B=100
It is observed that pressure of vapour above the solution at 'T' Kelvin is 350 mm Hg. The true statement is :

Options

A. The liquids form ideal solution.
B. The solute-solvent interactions ar weaker than solvent-sovlent or solute-solute interactions.
C. The volume of final solution will be lower than sum of individual volumes.
D. The enthalpy change due to mixing will be zero.

Answer

C