Which condition is not satisfied by an ideal solution?

Which condition is not satisfied by an ideal solution?

In a binary ideal solution of liquids $A$ and $B$ at a constant temperature,the mole fraction of $A$ in the liquid phase is $0.7$ and in the vapor phase is $0.4$. If $P_A^o + P_B^o = 90 \, mm$,then the vapor pressures of pure liquids $A$ and $B$ at that temperature are respectively:

Which of the following is appropriate for the solution made by mixing acetone and carbon disulphide?

What is a non-ideal solution and what is meant by positive deviation from Raoult's law?

$2 \ moles$ each of liquids $A$ and $B$ are dissolved to form an ideal solution. What will be the mole fraction of $B$ in the vapour phase? Given: $P_A^o = 120 \ torr, P_B^o = 80 \ torr$