Consider the process described below:
Impure compound is dissolved in solvent and heated at high temperature. Upon cooling the hot solution, pure compounds separate from the solution.
This process is known as
Distillation
Fractional distillation
Sublimation
Crystallisation
As we have learnt,
The impure compound is dissolved in solvent and heated at high temperature. Upon cooling the hot solution, pure compounds crystallises.
This process is known as Crystallisation.
Hence, the correct answer is Option (4)