s-Block ElementsHard

Question

Identify the correct statement.

Options

A.Gypsum contains a lower percentage of calcium than Plaster of Paris
B.Gypsum is obtained by heating Plaster of Paris
C.Plaster of Paris is obtained by hydration of gypsum
D.Plaster of Paris is obtained by partial oxidation of gypsum

Solution

2[CaSO4.2H2O] → 2CaSO4.H2O (calcium sulphate hemihydrate) + 3H2O
 Gypsum                     Plaster of Paris

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