Question

The statement given below is incorrect. Write the correct statement.

Ammonium chloride can be obtained from a mixture of ammonium chloride and sand, by the process of decantation.

Answer 1

The correct statement is - Ammonium chloride can be obtained from a mixture of ammonium chloride and sand, by the process of sublimation.

• Sublimation involves the conversion of a solid directly into its vapor state without being converted into a liquid.
• Ammonium chloride has a tendency to sublimate.
• So, when a mixture is kept in a china dish covered with an inverted flask closed with cotton plugs and heated.
• After some time, ammonium chloride converts into vapors, and sand remains behind on the china dish.
• Ammonium chloride vapors get condensed on the wall of the inverted flask. Hence, it can be collected after sublimation and the sand remains as a residue.