Match List I with List II. List I List II Reaction Reagents (A) Hoffmann Degradation (I) Conc. KOH , Δ (B) Clemmensen reduction (II) CHCl 3 , NaOH / H 3 O + (C) Cannizzaro reaction (III) Br 2 , NaOH (D) Reimer-Tiemann reaction (IV) Zn - Hg / HCl

Question

Match List I with List II. List I List II Reaction Reagents (A) Hoffmann Degradation (I) Conc. KOH , Δ (B) Clemmensen reduction (II) CHCl 3 , NaOH / H 3 O + (C) Cannizzaro reaction (III) Br 2 , NaOH (D) Reimer-Tiemann reaction (IV) Zn - Hg / HCl, (A) - III, (B) - IV, (C) - II, (D) - I, (A) - II, (B) - IV, (C) - I, (D) - III, (A) - III, (B) - IV, (C) - I, (D) - II, (A) - II, (B) - I, (C) - III, (D) - IV

MARKS App · Accepted Answer

(A) Hoffmann degradation reaction: Hoffmann developed a method for the preparation of primary amines by treating an amide with bromine in an aqueous or ethanolic solution of sodium hydroxide. O ∥ R - C - NH 2 + Br 2 + 4 NaOH → R - NH 2 + Na 2 CO 3 + 2 NaBr + 2 H 2 O (B) Clemmensen reduction reaction: The Clemmensen reduction is a reaction that is used to reduce aldehydes or ketones to alkanes using hydrochloric acid and zinc amalgam. (C) Cannizzaro reaction: Aldehydes which do not have an α -hydrogen atom, undergo self-oxidation and reduction (disproportionation) reaction on heating with concentrated alkali. (D) Reimer-Tiemann reaction: On treating phenol with chloroform in the presence of sodium hydroxide, a –CHO group is introduced at ortho position of benzene ring. This reaction is known as Reimer-Tiemann reaction. So, the correct matching is given in the following table: Reactions Reagent used (A) Hoffmann degradation Br 2 / NaOH (B) Clemmensen reduction Zn - Hg / HCl (C) Cannizzaro reaction conc.KOH/ KOH / ∆ (D) Reimer-Tiemann reaction CHCl 3 , NaOH / H 3 O +

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List I		List II
Reaction		Reagents
(A)	Hoffmann Degradation	(I)	Conc. $KOH, Δ$
(B)	Clemmensen reduction	(II)	${CHCl}_{3}, NaOH / H_{3} O^{+}$
(C)	Cannizzaro reaction	(III)	${Br}_{2}, NaOH$
(D)	Reimer-Tiemann reaction	(IV)	$Zn - Hg / HCl$

Reactions	Reagent used
(A) Hoffmann degradation	${Br}_{2} / NaOH$
(B) Clemmensen reduction	$Zn - Hg / HCl$
(C) Cannizzaro reaction	conc.KOH/ $KOH / ∆$
(D) Reimer-Tiemann reaction	${CHCl}_{3}, NaOH / H_{3} O^{+}$