Match List-I with List-II. List-I Reagents List-II Reaction Name (Involving aldehydes) --- --- A. H 2 , Pd - BaSO 4 I. Etard Reaction B. SnCl 2 , HCl II. Rosenmund Reduction C. CrO 2 Cl 2 , CS 2 III. Gatterman-KochReaction D. CO , HCl , Anhyd. AlCl 3 IV. Stephen Reaction Choose the correct answer from the options given below:

Chemistry · Aldehydes and Ketones

JEE Main 2026 — 21 January, Evening Shift — Question 52

Match List-I with List-II.

List-I Reagents	List-II Reaction Name (Involving aldehydes)
A. $\mathrm{H}_{2}, \mathrm{Pd}-\mathrm{BaSO}_{4}$	I. Etard Reaction
B. $\mathrm{SnCl}_{2}, \mathrm{HCl}$	II. Rosenmund Reduction
C. $\mathrm{CrO}_{2} \mathrm{Cl}_{2}, \mathrm{CS}_{2}$	III. Gatterman-KochReaction
D. $\mathrm{CO}, \mathrm{HCl}$ , Anhyd. $\mathrm{AlCl}_{3}$	IV. Stephen Reaction

Choose the correct answer from the options given below:

Option A:
A-II, B-III, C-IV, D-I
Option B:
A-IV, B-III, C-I, D-II
Option C:
A-IV, B-I, C-II, D-III
Option D:
A-II, B-IV, C-I, D-III
Correct

Answer: D

Step-by-step solution

Match each reagent with the correct reaction name: $\ce{H2, Pd-BaSO4}$ is used in Rosenmund reduction (reduction of acyl chlorides to aldehydes). $\ce{SnCl2, HCl}$ is used in Stephen reduction (reduction of nitriles to aldehydes). $\ce{CrO2Cl2, CS2}$ is used in Etard reaction (oxidation of methyl group to aldehyde). $\ce{CO, HCl}$ with anhydrous $\ce{AlCl3}$ is used in Gatterman-Koch reaction (formylation of aromatic compounds). Thus, the correct matching is A-II, B-IV, C-I, D-III, which corresponds to option D.

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Exam: JEE Main 2026
Paper: 21 January, Evening Shift
Subject: Chemistry
Chapter: Aldehydes and Ketones
Topic: Introduction and Preparation of Aldehydes and Ketones