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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)-(D), (II)-(A), (III)-(C), (IV)-(B)

Solution

The correct matches align the compounds with their common uses: Ca(OH)2 is used in the preparation of washing soda, NaCl is used in making casts of statues, CaSO4·1/2 H2O serves as an antacid, and CaCO3 is commonly used for whitewashing.

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