Which of the following salts contain water of crystallisation:
(i) Plaster of Paris, (ii) Washing soda, (iii) Baking soda and (iv) Gypsum.
A. (i), (ii) and (iii)
B. (i), (iii) and (iv)
C. (ii), (iii) and (iv)
D. (i), (ii) and (iv)
Answers (1)
D. (i), (ii) and (iv)
Plaster of Paris is \(CaSO_4.1/2 H_2O\),
Washing soda \(Na_2CO_3.10 H_2O\)
Baking soda \(NaHCO_3\) and
Gypsum is \(CaSO_4.2H_2O\)
