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

Options

A. Boiling point of pure water increases by the addition of common salt
B. Vapour pressure of pure water decreases by the addition of nitric acid
C. Vapour pressure of pure benzene decreases by the addition of haphthalene
D. Boiling point of pure benzene increases by the addition of toluene

Answer

A, C