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24/12/2021 1:30 pm
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The difference of number of water molecules in gypsum and plaster of Paris is
(a) \(\frac{5}{1}\)
(b) 2
(c) \(\frac{1}{2}\)
(d) \(1\frac{1}{2}\)
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24/12/2021 1:34 pm
Correct answer: (d) \(1\frac{1}{2}\)
Explanation:
Gypsum is CaSO4.2H2O, where as plaster of paris is CaSO4\(\frac{1}{2}H_2O\)
No. of water = (2 - \(\frac{1}{2}\)) → \(\frac{3}{2}\) or \(1\frac{1}{2}\) molecules.