Question

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

• A. Benzene + Toluene
• B. Acetone + Ethanol
• C. Chlorobenzene + Bromobenzene
• D. Water + Nitric acid

Answer 1

The correct option is D Water + Nitric acid

• $(H_{2}O+HN{O}_3)$ mixture shows negative deviation from Raoult’s law, as on mixing there is decrease in vapour pressure as well as in total volume due to increase in inter molecular forces of attraction.
• Benzene + Toluene and chlorobenzene + Bromobenzene are ideal solutions.
• Acetone + Ethanol shows positive deviation from Raoult’s law.