Which from following mixtures exhibits positive deviation from Raoult's law?

Step-by-step solution

Positive deviation from Raoult's law occurs when vapor pressure exceeds predictions due to weaker intermolecular attractions between mixture components than within pure substances. Ethanol and acetone demonstrate this behavior: ethanol's strong hydrogen bonds are disrupted upon mixing, while acetone provides only dipole-dipole interactions. The resultant ethanol-acetone interactions are weaker than pure ethanol's hydrogen bonding, increasing vapor pressure. Benzene-toluene mixtures exhibit near-ideal behavior with