JEE Advanced 2023 Paper 1 · Q17 · Named Reactions & Reagents

Question

The major products obtained from the reactions in List-II are the reactants for the named reactions mentioned in List-I. Match List-I with List-II.
List-I:
(P) Étard reaction
(Q) Gattermann reaction
(R) Gattermann–Koch reaction
(S) Rosenmund reduction
List-II:
(1) Acetophenone via Clemmensen reduction → ethylbenzene
(2) Benzoic acid via $KMnO_4$/KOH oxidation, then $SOCl_2$ → benzoyl chloride
(3) Toluene via $CH_3Cl/AlCl_3$
(4) Aniline via reduction of nitrobenzene, then $NaNO_2/HCl$ → benzene diazonium chloride
(5) Phenol via Zn-dust pyrolysis → benzene

SolveKar AI · Accepted Answer

Étard uses toluene (from Friedel–Crafts $CH_3Cl/AlCl_3$) — (P)→(3). Gattermann uses arenediazonium salt (from aniline + $NaNO_2/HCl$) — (Q)→(4). Gattermann–Koch uses benzene (e.g. via Zn dust from phenol) + CO/HCl/AlCl$_3$ → benzaldehyde — (R)→(5). Rosenmund uses acyl chloride (from $KMnO_4/KOH$ oxidation then $SOCl_2$) — (S)→(2).

JEE Advanced 2023 Paper 1 · Q17 · Named Reactions & Reagents

Solution