A compound X having 2 molecules of water of crystallization.On heating, it becomes a new compound Y used in plastering of fractured bones.The compound X is ___ .

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Solution

The compound X is Gypsum(CaS $O_{4}$ ●2 $H_{2}$ O) having two molecules of water of crystallization.On heating gypsum, it loses one and a half molecules of water of crystallization and becomes the compound Y which is Plaster of Paris (CaS $O_{4}$ ● $\frac{1}{2}$ $H_{2}$ O), used in plastering of fractured bones and making statues etc.

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Q. (a) What is gypsum? What happens when gypsum is heated to 100°C (373 K)?
(b) Name a sodium compound which is used for making borax and glass.
(c) Name the compound which is used in hospitals for setting fractured bones.
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