Chemistry - Liquid Solution Question with Solution | TestHub

A negative deviation from Raoult's law occurs when the A-B intermolecular forces are stronger than the average of A-A and B-B forces. This leads to a lower vapor pressure than ideal, an exothermic mixing process ($\Delta H_{mix}<0$), and a decrease in volume upon mixing ($\Delta V_{mix}<0$).

The correct option is B.

$$\Delta H_{mix}<0$$