The chemical formula for plaster of Paris is :(a) CaSO4. 2 H2O (b) CaSO4. H2O (c) CaSO4 . 1/2 H2O (d) 2CaSO4. H2O
Correct Answer: (c) CaSO4 . 1/2 H2O
Explanation: The chemical name of Plaster of Paris is calcium sulphate hemihydrate.
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