Chemistry - Carboxylic acid and their Derivatives Question with Solution | TestHub

$\begin{array}{ccccc}\stackrel{\text{α}}{{\text{CH}}_3}\text{COOH}& \underset{{\text{Br}}_2/\text{P}}{\overset{\text{H.V.Z}}{\to }}& {\text{BrCH}}_2\text{COOH}& \underset{{\text{H}}_3{\text{O}}^{\oplus }}{\overset{\text{KCN}}{\to }}& \text{HOOC}-{\text{CH}}_2-\text{COOH}\\ & & \left(\text{Y}\right)& & \left(\text{X}\right)Malonic\; acid\end{array}$