Question

Crystals having a fixed number of water molecules are known as anhydrous substances.

• A. True
• B. False

Answer 1

The correct option is B False

Hydrous substances:

• Word Hydrous is referred to a substance that contains water molecules as a constituent.
• These hydrous compounds are called hydrates.
• Here, water means the water of crystallization.
• Here water can get trapped inside the crystal lattice of substances during crystallization.
• For example: $\mathrm{Copper}\mathrm{sulphate}\left({\mathrm{CuSO}}_4.7{\mathrm{H}}_2\mathrm{O}\right)$

Conclusion:

So, Crystals having a fixed number of water molecules are known as hydrous substances, not an anhydrous substances.

Therefore, the given statement is false. 6