In the reaction sequence, $C_2{H}_{5}Cl + KCN \stackrel{C_2{H}_{5}OH}{\to }X \stackrel{H_3{O}^{+}}{\to }Y+N{H}_3$ .

 What is the molecular formula of ‘Y’ ?

Given data: It is given to identify the molecular formula Y.

Explanation

$C_2{H}_{5}Cl + KCN \stackrel{C_2{H}_{5}OH}{\to }{C}_2{H}_{5}CN \stackrel{H_3{O}^{+}}{\to }EtCOOH+N{H}_3$

 X:- $C_2{H}_{5}CN$Y:- $C_2{H}_{5}COOH$

Hence, the correct option (A).  $C_3{H}_6{O}_2$.