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Match the following compounds (Column-I) with their uses (Column-II): Column-I: (I) Ca(OH)2, (II) NaCl, (III) CaSO4·1/2 H2O, (IV) CaCO3 Column-II: (A) casts of statues, (B) white wash, (C) antacid, (D) washing soda preparation

1. (I)-(D), (II)-(A), (III)-(C), (IV)-(B)
2. (I)-(B), (II)-(C), (III)-(D), (IV)-(A)
3. (I)-(C), (II)-(D), (III)-(B), (IV)-(A)
4. (I)-(B), (II)-(D), (III)-(A), (IV)-(C)

Correct answer: (I)-(B), (II)-(D), (III)-(A), (IV)-(C)

Solution

Ca(OH)2 is used for white wash (B), NaCl for washing soda preparation (D), CaSO4.1/2H2O (plaster of Paris) for casts of statues (A), and CaCO3 as an antacid (C). So I-B, II-D, III-A, IV-C.

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