Water of Crystallization

The salts lose their water of crystallisation on heating, are called hydrated salts.

Identify the efflorescent substance from the following:

Efflorescence is a process in which crystalline salt loses its shape and turns powdery. What is true in this context:

When crystals of copper sulphate are strongly heated, the residue obtained is

${\mathrm{Na}}_2{\mathrm{SO}}_4·10{\mathrm{H}}_2\mathrm{O}$ is an example of:

Describe how crystals of copper sulphate are prepared.

What do you understand by crystallisation? How will you prepare the crystals of alum?

What is water of crystallisation? Give example.

The water of crystallisation is a fixed number of water molecules present in one formula unit of salt.