The mixture which shows positive deviation from Raoult’s law is:

In Ethanol + Acetone, the strong hydrogen bonding in pure ethanol is weakened by acetone molecules. This increases the vapour pressure of the mixture compared to an ideal solution, resulting in positive deviation.Benzene + Toluene and Chloroethane + Bromoethane are nearly ideal.Acetone + Chloroform shows negative deviation due to new H-bond formation.