Q. An amine reacts with benzene sulfonyl chloride to form a white precipitate which is insoluble in aq. . The amine is

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Solution:

Since, the amine gives white precipitate with benzene sulphonyl chloride which is insoluble in aq. , so it must be a secondary amine (i.e., amine having RNHR group).
Among the given compound, only
image
is a secondary amine, so it represents the structure of given amine.