(a) What is gypsum ? What happens when gypsum is heated to 100℃ (373K)?(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. (d) Which is the real bleaching powder agent in the bleaching powder?
(a) Gypsum is calcium sulphate dihydrate (CaSO4.2H2O) and when heated to a temperature of 373K it loses three-fourths of its water of crystallization and forms Plaster of Paris (CaSO4 .1/2H2 O)
(b) Sodium carbonate or washing soda is used to make borax and glass.
(c) Plaster of Paris is used in hospitals for setting fractured bones
(d) Bleaching powder is also called calcium chlorohypochlorite because a little of a mixture of hydrochloric acid and hypochlorous acid.
 
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