Question

Explain crystallisation with the help of labelled diagram.

Answer 1

$$\textbf {Crystallization}$$: A process that separates a pure solid in the form of its crystals from a solution is called crystallization. No new substance is formed, only crystals of the substance are formed. Therefore, crystallization is an example of physical change. To obtain a big crystal, a small piece of alum is hanged in the solution of alum with the help of a thread. After some time, we observe that piece of alum becomes bigger in size. This is due to the fact that small pieces of alum get deposited on alum.