Liquid Solution

Which of the following is/are "not correct" for $\mathrm{CH}_3 \mathrm{OH}+\mathrm{CH}_3 \mathrm{COOH}$ mixture solution?

1. 1. $\Delta H_{\text {mix }}<0$




2. 2. Does not obey Raoult's law.




3. 3. $\Delta H_{\text {mix }}>0$




4. 4. An example of ideal solution.