`underset(A)(C_(3)H_(6)Cl_(2))overset("(i) KCN")underset(underset("(iii) "Delta)("(ii) "H_(3)O^(+)))rarrCH_(3)underset(CH_(3))underset("| ")"CH"COOH`. Hence, A is

Options

A. 1, 1-dichloro propane
B. 1, 2-dichloro propane
C. 2,2-dichloro propane
D. 1, 3-dichloro propane

Answer

C

Explanation

End product indicates that A has `(CH_(3))_(2)CH` group.
Thus, A is `(CH_(3))_(2)CHCl_(2)`
`(CH_(3))_(2)CHCl_(2) overset(KCN)rarr (CH_(3))_(2)CH(CN)_(2)overset(H_(3)O^(+))rarr (CH_(3))_(2)CH(COOH)_(2) overset(Delta)rarr (CH_(3))_(2)CHCOOH`
when two `-COOH` groups are present on the same carbon then on heating elimintes `CO_(2)`.