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Amines

Question
CBSEENCH12009036
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Give one chemical test to distinguish between the following pairs of compounds.
Secondary and tertiary amines.

Solution

Shake the given amines separately with Hinsberg’s reagent (benzene sulphonyl chloride) in the presence of an excess of aqueous KOH solution.
A secondary amine forms N,N—dialkyl benzene sulphonamide which remains insoluble in aqueous KOH and even after acidification with dilute HCl.

A tertiary amine does not react with benzene sulphonyl chloride and remains insoluble in aqueous KOH.

Some More Questions From Amines Chapter

What type of isomerism is exhibited by different pairs of amines?

How will you convert Benzene into N, N-dimethylaniline?

Arrange the following in increasing order of their basic strength:
C2H5NH2, C6H5NH2, NH3, C6H5CH2NH2 and (C2H5)2NH

Arrange the following in increasing order of their basic strength:
C2H5NH2, (C2H5)2NH, (C2H5)3N, C6H5NH2

Arrange the following in increasing order of their basic strength:
CH3NH2, (CH3)2NH, (CH3)3N, C6H5NH2, C6H5 CH2NH2

Write reactions of the final alkylation product of aniline with excess of methyl iodide in the presence of sodium carbonate solution.

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