You are provided with a mixture of naphthalene and ammonium chloride by your teacher. Suggest an activity to separate them with well labelled diagram

Explanation

Naphthalene is insoluble in water but soluble in benzene (organic solvent). Ammonium chloride is soluble in water but in benzene. Napthalene change into vapour at room temperature whereas ammounium chloride changes into vapours on heating .
Method
(a) Add water to the mixture and shake it vigorously to dissolved ammonium chloride.
(b) Filter the mixture. Anphthalene is obtained as residue whereas, filtrate contains ammonium chloride. Crystallise the filtrate by heating till saturated solution of ammonium chloride is obtained.
(c) Cool the hot saturated solution to get crystals of ammonium chloride.