Each pair forms an ideal solution except?

Liquids $A$ and $B$ form an ideal solution in the entire composition range. At $350 \ K$,the vapour pressures of pure $A$ and pure $B$ are $7 \times 10^3 \ Pa$ and $12 \times 10^3 \ Pa$,respectively. The composition of the vapour in equilibrium with a solution containing $40 \ \text{mole percent}$ of $A$ at this temperature is

Which of the following is a non-ideal solution?

Which of the following will form an ideal solution?

When $25 \ mL$ of acetone is mixed with $25 \ mL$ of ethanol,the volume of the resulting solution will be ...........

On mixing $10 \ mL$ $CCl_4$ and $10 \ mL$ benzene,the total volume of solution is