Question

Is the following statement correct?

Mixture of salt and ammonium chloride can be seperated by crystallisation process.

Answer 1

1. Crystallisation: It is a process which separated a pure solid in the form of its crystals from a solution.
2. A mixture of salt and ammonium chloride cannot be separated by crystallisation as crystallisation requires one of the components to be less soluble than the other.
3. Salt and ammonium chloride can be separated using another process called sublimation in which a solid phase directly changes to its gaseous form.
4. Ammonium chloride directly becomes a gas from a solid on heating. So when the mixture is heated, ammonium chloride sublimes and can be collected as a sublimate and salt will be left behind as a solid as salt doesn't undergo sublimation.

Hence, the given statement is incorrect.