Q.

How will you distinguish between the following pairs of compounds :
(a) Aniline and Ethanamine
(b) Aniline and N-methylaniline

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Detailed Solution

(a)

Chemical TestC2H5NH2C6H5NH2
Azo dye Test: Add NaNO2+ dil. HCl at 273-278K followed by NaOH and β-naphtholNo reactionYellow orange dye is obtained.
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(b)
 

Chemical TestAnilineBenzyl amine
Test: Add nitrous acid NaNO2/HCl to both the samples.No evolution of N2 gas
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How will you distinguish between the following pairs of compounds :(a) Aniline and Ethanamine(b) Aniline and N-methylaniline