Question

Which one of the statements given below concerning properties of solutions, describes a colligative effect?

Options

• Boiling point of pure water decreases by the addition of ethanol.

• Vapour pressure of pure water decreases by the addition of nitric acid.

• Vapour pressure of pure benzene decreases by the addition of naphthalene.

• Boiling point of pure benzene increases by the addition of toluene.

Answer 1

Vapour pressure of pure benzene decreases by the addition of naphthalene.