(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.
(d) Which is the real bleaching agent present in bleaching powder?
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Answer: (a)-Gypsum is a calcium sulphate containing 2 molecules of water of crystallisation.
When Gypsum is heated to a temperature of 100°C (373 K) it loses three- fourth(3/4) of it's water of crystallisation and forms plaster of Paris.
(b)- Sodium Carbonate
(c)- Plaster of Paris.
(d)- Chlorine ...
.. Hope this helps you..
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