Question

Which of the following salts does not contain water of crystallisation?
A. Blue vitriol
B. Baking soda
C. washing soda
D. Gypsuym

Answer 1

Correct Answer - B
Chemical formula of baking soda is `NaHCO_(3)` (sodium hydrogen carbonate). Chemical formulae pof blue ivtriol is `CuSO_(4)`, washing soda is `Na_(2)CO_(3) . 10 H_(2)O` and gypsum is `CaSO_(4). 2H_(2)O`.
SO, baking powder does not contain water of crystallisation