The pV-curve shown represents a solution exhibiting **negative** deviation from Raoult's law. Which mixture is an example of this behaviour? 

Negative deviation: solute–solvent interactions are **stronger** than like-like. Chloroform + acetone form a hydrogen bond between the C–H of CHCl₃ and the carbonyl O of acetone, holding molecules tighter and lowering escape rate — vapour pressure dips below Raoult. Phenol + aniline is the other classic example. Ethanol + acetone shows positive deviation.