NCERT Exemplar Solutions
Class 10 - Science - CHAPTER 2: Acids, Bases and Salts - Multiple Choice Questions
Question 4

Question.  4

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

(a)

Blue vitriol

(b)

Baking soda

(c)

Washing soda

(d)

Gypsum

Detailed Answer with Explanation:

Steps: Baking soda = NaHCO₃ (typically anhydrous). Blue vitriol = CuSO₄·5H₂O, washing soda = Na₂CO₃·10H₂O, gypsum = CaSO₄·2H₂O. So baking soda does not contain water of crystallisation.

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