Q: Which one of the following is the chemical formula of Plaster of Paris?
(a)CaSO₄·½ H₂O
(b)CaSO₄·2 H₂O
(c)CaSO₄·5 H₂O
(d)CaSO₄·4 H₂O
Correct Answer: (a)
The correct answer is (c) 'CaSO₄·5 H₂O'. This question from the General Studies domain tests knowledge of Miscellaneous.