How sand, salt and ammonium chloride will be separated from their mixture ? Explain.

The following procedure can be followed for separating a mixture of sand, salt and ammonium chloride:

• The mixture is first subjected to sublimation. Ammonium chloride sublimes, leaving behind sand and salt. The vapours of ammonium chloride are collected and on cooling down, they solidify.
• The solvent extraction method is used to separate the mixture of sand and salt. Water is added to the mixture. Common salt dissolves while sand settles down. The salt solution is carefully decanted to separate it from sand.
• The solution is then evaporated to obtain salt from water.