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Question

Match the following columns.

Column (I) Column(II)
(1) Plaster of Paris(i) Ca(OH)2
(2) Gypsum (ii) CaSO4.12H2O
(3) Bleaching powder(iii) CaSO4.2H2O
(4) Slaked lime(iv) CaOCl2

A
(1) (ii), (2) (iii), (3) (iv), (4) (i)
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B
(1) (iii), (2) (ii), (3) (iv), (4) (i)
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C
(1) (i), (2) (iii), (3) (iv), (4) (ii)
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D
(1) (iii), (2) (iii), (3) (iv), (4) (i)
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Solution

The correct option is B (1) (ii), (2) (iii), (3) (iv), (4) (i)
1) Plaster of Paris is CaSO412H2O. It is calcium sulphate and it differs from gypsum only with water of crystallization.
2) Gypsum is formed if plaster of paris absorbs moisture becomes a hard material.
CaSO42H2O
3) Bleaching powder is calcium oxychloride which is used for bleaching purposes.
4) Slaked lime is known as calcium hydroxide.

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