Question

4. Why do we use Alum? *

To bring out the process of sedimentation.
To separate soluble components from
insoluble components
To separate sublimable substances from non
sublimable substances​

Answer 1

In which method of separation alum is used?

Crystallization

Crystallization is used to separate alum from impurities. Alum is used in loading process to attract all the impurities to its surface. In crystallization, the alum is heated. During heating, the pure alum gets separated from its solution of impurities in form of a crystal.