JEE Main 2026 — Aldehydes and Ketones Question with Solution
JEE Main 2026 (21 January Shift 2)
Question
Match List - I with List - II.
Choose the correct answer from the options given below :
Choose the correct answer from the options given below :
Choose an option
Show full solutionCorrect option: B
Correct answer
BA-II, B-IV, C-I, D-III
Step-by-step explanation
Matching reagents with aldehyde reaction types:
A (H2, Pd-BaSO4) is the Lindlar/Rosenmund catalyst used in Rosenmund Reduction to convert acyl chlorides to aldehydes, matching with II.
B (SnCl2, HCl) is used in Stephen Reaction where nitriles are converted to aldehydes via imine intermediate, matching with IV.
C (CrO2Cl2, CS2) is Jones-like reagent used in Etard Reaction for oxidizing methyl groups on aromatic rings to aldehydes, matching with I.
D (CO, HCl, Anhyd. AlCl3) is the Gatterman-Koch Reaction which directly converts benzene to benzaldehyde using CO and AlCl3 catalyst, matching with III.
Therefore the correct matching is A-II, B-IV, C-I, D-III
A (H2, Pd-BaSO4) is the Lindlar/Rosenmund catalyst used in Rosenmund Reduction to convert acyl chlorides to aldehydes, matching with II.
B (SnCl2, HCl) is used in Stephen Reaction where nitriles are converted to aldehydes via imine intermediate, matching with IV.
C (CrO2Cl2, CS2) is Jones-like reagent used in Etard Reaction for oxidizing methyl groups on aromatic rings to aldehydes, matching with I.
D (CO, HCl, Anhyd. AlCl3) is the Gatterman-Koch Reaction which directly converts benzene to benzaldehyde using CO and AlCl3 catalyst, matching with III.
Therefore the correct matching is A-II, B-IV, C-I, D-III
Practice this on the real CBT interface
Solve this JEE Main question (and the rest of the Aldehydes and Ketones chapter) on PrepSharp's TCS iON-style CBT player — with timer, bookmarks and session analytics.
Solve interactively →About this question
This is a previous-year question from JEE Main 2026, covering the Aldehydes and Ketones chapter of Chemistry. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.