Which one is not equal to zero for an ideal solution?

For the ideal solution

$\Delta {\text{H}}_{\text{mixture}} = 0,$ because new bond formed and break so no enthalpy gain or lose.

$\Delta {\text{S}}_{\text{mixture}} > 0,$ because randomness increasing on mixing on a solution.

$\Delta {\text{V}}_{\text{mixture}} = 0,$ ${e}^{-}$ because no new bond for or break so, no force of attraction change.

$\Delta \text{P} = {\text{P}}_{\text{observed}} - \Delta {\text{P}}_{\text{Raoult}} = 0;$ vapour pressure remains the same because of no force of attraction increase or decrease.