Which one of the following is incorrect for ideal solution?

For an ideal solution:$\Delta H_{\text{mix}}=0$$\Delta V_{\text{mix}}=0$ (and consequently $\Delta U_{\text{mix}}=0$)$\Delta P=0$ (Raoult's law is obeyed).However, mixing is a spontaneous process, so $\Delta G_{\text{mix}}$ must be negative ($\Delta G_{\text{mix}}<0$). Also, $\Delta S_{\text{mix}}$ is always positive.Therefore, $\Delta G_{\text{mix}}=0$ is incorrect.