The graph in the figure shows a solution whose total vapour pressure is **higher** than that predicted by Raoult's law. Such a solution is a positive-deviation type. Which mixture is an example? 

Positive deviation arises when solute–solvent interactions are **weaker** than the like-like interactions. In ethanol + acetone (or CS₂ + acetone), ethanol's H-bonding network is disrupted by the less interacting acetone — partial vapour pressures rise above Raoult prediction. Phenol + aniline and chloroform + acetone show **negative** deviation; benzene + toluene is nearly ideal.