If liquids $A$ and $B$ form an ideal solution,which of the following statements is true?

For an ideal solution of two components $A$ and $B$,which of the following is true?

Which of the following is not equal to zero for an ideal solution?

In a binary ideal solution of liquids $A$ and $B$ at a constant temperature,the mole fraction of $B$ in the liquid phase is $0.4$ and in the vapor phase is $0.25$. If $P_B^o = 40 \ mm \ Hg$,then the vapor pressure of pure liquid $A$ at that temperature is .......... $mm \ Hg$.

For a solution of two liquids $A$ and $B$,if $P = X_A (P_A^o - P_B^o) + P_B^o$ holds true,then what type of solution is it?

If liquids $A$ and $B$ form an ideal solution,then which of the following is true?