Question

The products of the following chemical reactions are
(i) $C_{2}H_{5}NH_{2} \, +C_{6}H_{5}SO_{2}Cl \rightarrow _{}^{}$
(ii) $C_{2}H_{5}NH_{2} \, +HNO_{2}\overset{H_{2} O}{ \rightarrow }$

• A. (i) $\text{C}_{6} \text{​} \text{H}_{5} \text{S} \text{O}_{2} \text{N} \text{H} \text{C}_{2} \text{H}_{5}$
  (ii) $C_{2}H_{5}Cl$
• B. (i) $\text{C}_{6} \text{​} \text{H}_{5} \text{S} \text{O}_{2} \text{N} \text{H} \_{2}^{}$
  (ii) $C_{2}H_{5}OH$
• C. (i) $\text{C}_{6} \text{​} \text{H}_{5} \text{S} \text{O}_{2} \text{N} \text{H} \text{C}_{2} \text{H}_{5}$
  (ii) $C_{2}H_{5}OH$
• D. None of these

Answer 1

Answer: (C)

• Benzene sulphonyl chloride ( $C_{6}H_{5}SO_{2}Cl$ ), which is also known as Hinsberg’s reagent, reacts with primary and secondary amines to form sulphonamides. The reaction of benzene sulphonyl chloride with primary amine yields N-alkylbenzenesulphonamide.
• Aliphatic primary amines upon reaction with nitrous acid, they give primary alcohols.

The reactions as follows :
(i) $C_{2}H_{5}NH_{2} \, +C_{6}H_{5}SO_{2}Cl \rightarrow C_{6}​H_{5}SO_{2}NHC_{2}H_{5} \, +HCl$
(ii) $C_{2}H_{5}NH_{2}+HNO_{2} \rightarrow \left[\right.C_{2}H_{5}N_{2}^{+}Cl^{-}\left]\right. \rightarrow _{}^{H_{2} O}C_{2}H_{5}OH+N_{2}+HCl$