Pure copper sulphate can be obtained form an impure sample by the process of :

The chemical which can be used to separate a mixture of carbon powder and sulphur powder successfully is:

The dyes present in fountain pen ink can be separated by the technique of :

The material which is added to water during purification process at the water works so as to disinfect it is :

The technique which is used to separate particles of a solid suspended in a liquid quickly is called: