A compound [A] with molecular formula `C_(5)H_(10)O` gave a positive `2,4`-D.N.P. Test but a negtive Tollen's test. It was oxidised to carboxylic acid [B] with molecular formula `C_(3)H_(6)O_(2)` when treated with alkaline `KMnO_(4)` under vigorous conditions. Sodium salt of [B] gave a hydrocarbon [C] on Kolbe's electrolyte reaction. Identify [A],[B] and [C] and write the chemical equations for the reactions.

Explanation

As the compound `A(C_(5)H_(10)O)` gave a positive `2, 4 - D.N.P.` test, in must be carbonyl compound i.e., aldehyde or ketone, Since it gave a negative Tollen's test, it must be a ketone and not an aldehyde. Since ketone upon oxidation reactions may be shows as follows :

The sodium salt of the acid B when subjected to Kolbe's reactions gives hydrocarbon which is butane `[C]` as given in the equations