Question

Which of the following solution pairs can be separated by fractional distillation?

Options

• Water-HNO₃

• Water-HCl

• Benzene-toluene

• C₂H₅OH-water

Answer 1

Benzene-toluene

Explanation:

Benzene and toluene form an ideal solution, meaning they do not form an azeotrope and can be separated based on their difference in boiling points using fractional distillation.
Other pairs like Water-HNO₃, Water-HCl, and Ethanol-Water form azeotropes, making complete separation by fractional distillation impossible.