Which salts does not contain water of crystallisation

• GC Acids Bases Salts

Which of the following salts does not contain water of crystallisation?

1. Blue vitriol
2. Baking soda
3. Washing soda
4. Gypsum

Answer

Blue vitriol is CuSO₄.5H₂O

Baking soda is NaHCO₃

Washing soda is Na₂CO₃.10H₂O

Gypsum is CaSO₄.2H₂O

The correct option is B.