Published by:
CGP EDU Academic Team
Published on: August 14, 2026
Consider the following statements,
S 1 : Gypsum contains a lower percentage of calcium than plaster of pairs.
S 2 : Plaster of paris can be re-obtained by hydration of 'dead plaster'.
S 3 : Gypsum loses 
of its water of crystallisation forming plaster of paris at 120ºC.
S 4 : Plaster of paris can be obtained by partial oxidation of gypsum.
and arrange in the order of true/false.
Text Solution
Verified by ExpertsThe correct answer is:
A
CaSO 4 . 2 H 2 O 
2 CaSO 4 .H 2 O (Calcium sulphate hemihydrate).
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