Compound 'A' when dissolved in water gives compound 'B'which is used in whitewashing. Compound 'B' reacts with CO_(2) to form a white precipitate of compound 'C'. Identify compounds 'A', 'B' and 'C'. Also write the equations involved.

Compound 'A' when dissolved in water gives compound 'B'which is used i

1.	Compound 'A' when dissolved in water gives compound 'B'which is used in whitewashing. Compound 'B' reacts with CO_(2) to form a white precipitate of compound 'C'. Identify compounds 'A', 'B' and 'C'. Also write the equations involved.
Answer» Solution :`.A.undersetundersetoverset("Exothermic")("reaction")rarr(+H_(2)O)underset("whitewashing")underset("Used for")(.B.)+CO_(2)rarrunderset("White ppt")(.C.)` Slaked lime `[(CA(OH)_(2)]` is used for whitewashing. It is obtained when quicklime, CAO reacts with water. `underset("Quicklime")(CaO)+H_(2)Orarrunderset(("Slaked lime"))underset("Calcium hydroxide")(Ca(OH)_(2))+"Heat"` So .A. is CaO and .B. is `Ca(OH)_(2)`. `Ca(OH)_(2)(aq)+CO_(2)(g)rarrundersetunderset(("White ppt."))("Calcium CARBONATE")(CaCO_(3)(s))+H_(2)O(l)` .C. is `CaCO_(3)`.