Question

Crystalline blue vitriol, crystalline common salt, crystalline ferrous sulphate, crystalline sodium carbonate. Identify the odd one out and justify.

Answer 1

ferrous sulphate
hope I helped you

Answer 2

The chemical formula of crystalline blue vitriol is CuSO4.5H2O.

The chemical formula of crystalline common salt is NaCl.

The chemical formula of crystalline sodium carbonate is Na2CO3. 3H2O.

The chemical formula of crystalline Ferrous Sulphate is FeSO4. 7H2O.  

As it can be noticed from the chemical formulas, the odd one out among the given salts is Crystalline Common Salt (NaCl) since it doesn’t have any water of crystallization.

Water of crystallization or Water of hydration refers to the water molecules (H20) which is chemically combined with a salt in its crystalline form.

The water molecules are present within the crystalline framework of the salt.