The best method for the separation of naphthalene and benzoic acid from their mixture is

Options

(a) distillation
(b) sublimation
(c) chromatography
(d) crystallisation

Correct Answer:

sublimation

Explanation:

Sublimation method is used for those organic substances which pass directly from solid to vapour state on heating and vice-versa on cooling.e.g.benzoic acid, naphthalene,camphor,anthracene, etc.Naphthalene is volatile and benzoic acid is nonvolatile due to the formation of the dimer.