28.When m-bromobenzoic acid is treated with socl2 gives A and when A is treated with NH3 it gives B.B on reaction with Naoh+Br2 gives C. Identify C.

Q. An organic compound $A$ has the molecular formula $C_7{H}_{6}O$. When $A$ is treated with $NaOH$ followed by acid hydrolysis, it gives two products $B$ and $C$. When $B$ is oxidized, it gives $A$, when $A$ and $C$ are each treated separately with $P{Cl}_5$, they give two different products $D$ and $E$.
(i) Identify $A$, $B$, $C$, $D$ and $E$.
(ii) Give the chemical reaction when $A$ is treated with $NaOH$ and name the reaction.

Q. A ketone (A) forms iodoform when it reacts with $I_2+NaOH$. (A) on reduction with $NaB{H}_4$ gives (B) which on heating with $H_{2}S{O}_4$ gives (C). (C) on reductive ozonolysis gives acetaldehyde and acetone.

Q. A solution of A, when treated with $N{H}_3$ gives________.

Q. $RBr$ when treated with $AgCN$ in a highly polar solvent gives _______ and when it is treated with $NaCN$, it gives _________.