Question

The water of crystallization is present in:
(i) Bleaching Powder
(ii) Plaster of Paris
(iii) Washing Soda
(iv) Baking Soda

• A. (ii) and (iv)
• B. (ii) and (iii)
• C. (i) and (iii)
• D. (i) and (iv)

Hint:

The water of crystallization is the water present in the crystal structure of certain salts, like plaster of Paris and washing soda.

Answer 1

The Correct Option is B

Crystallization water denotes water molecules chemically bonded within the crystal structure of specific salts. This water is vital for preserving the structure of these salts.
- Plaster of Paris (\( \text{CaSO}_4 \cdot ½\text{H}_2\text{O} \)) has crystallization water.
- Washing Soda (\( \text{Na}_2\text{CO}_3 \cdot 10\text{H}_2\text{O} \)) also contains crystallization water.
- Bleaching Powder and Baking Soda lack crystallization water.Therefore, the correct choice is (B) (ii) and (iii).