Which of the following liquid pairs does not show contraction in volume on mixing?

In a mixture of $A$ and $B$ components,the solution shows negative deviation when:

Solution $A$ contains acetone dissolved in chloroform and solution $B$ contains acetone dissolved in carbon disulphide. The type of deviations from Raoult's law shown by solutions $A$ and $B$,respectively,are:

Which of the following is not an ideal solution?

Raoult's law is obeyed by each constituent of a binary liquid solution when

Heptane and octane form an ideal solution. At $373 \, K$,the vapour pressures of the two liquid components are $105.2 \, kPa$ and $46.8 \, kPa$ respectively. What will be the vapour pressure of a mixture of $26.0 \, g$ of heptane and $35 \, g$ of octane (in $, kPa$)?