JEE Main · 2021 · 26 Feb 2021 · Shift 2 · Practical and Analytical Chemistry

Ceric ammonium nitrate and

CHCl_{3}

/alc. KOH are used for the identification of functional groups present in

____

and

____

respectively.

(A)amine, phenol
(B)alcohol, phenol
(C)amine, alcohol
(D)alcohol, amine✓ Correct

Answer: (D)

Solution

Ceric ammonium nitrate reacts with an alcohol by replacing a nitrate ligand of the cerium(IV) complex with the alkoxide group, and the yellow reagent turns red, so it tests for the hydroxyl group of an alcohol. Chloroform with alcoholic

KOH

generates dichlorocarbene, which attacks a primary amine to give an isocyanide of extremely offensive smell; this carbylamine test is given by primary amines alone. The two reagents identify alcohol and amine respectively.

JEE Main · 2021 · 26 Feb 2021 · Shift 2 · Single correct option

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