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Q.
The compound $X(C_7H_9N)$ reacts with benzene sulphonyl chloride to give $Y (C_{13}H_{13}NO_2S)$ which is insoluble in alkali. The compound $X$ is
KVPYKVPY 2013Amines
Solution:
Benzene sulphonyl chloride is also known as Hinsberg’s reagent, reacts with $1^{\circ}$ and $2^{\circ}$ amines to form sulphonamides.
The sulphonamide of $1^{\circ}$ amine is soluble in alkali whereas that
of $2^{\circ}$ amine is insoluble in alkali.
Thus, the given compound $Y(C_7H_9N)$ is $2^{\circ}$ amine, among the options (a)
is a $2^{\circ}$ amine, which reacts with benzene sulphonyl chloride to give $Y(C_3H_{13}NO_2S)$, which is insoluble in alkali.
