Give a test to distinguish between chloroform and carbon tetrachloride.

CHCl3 on warming with alc. KOH and aniline will give foul smelling of isocyanide; Whereas CCl4 will not give this reaction.

CHCl3 + C6H5-NH2 + 3KOH -- C6H5 - CN (Foul smell) + 3KCl + 3H2O

whereas CCl4 gives no foul smell.

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