1.

A solid compound 'A' decomposes on heating into'B' and a gas 'C' .On passing the gas 'C' through water,it becomes acidic .Identify A,B and C.

Answer»

Solution :`underset(("A"))(CaCO_(3(s)))tounderset("(B)")(CaCO_((s)))+underset("(C)")(CO_(2(g)))`
CALCIUM carbonate decomposes into solid calcium OXIDE and a GAS `CO_(2)` This `CO_(2)` dissolves in water and forms carbonic acid.
`H_(2)O+underset("(C)")(CO_(2))tounderset("Carbonic acid")(H_(2)CO_(3))`


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