JEE Main 202621 JanuaryEvening Shift
- Exam
- JEE Main
- Year
- 2026
- Date
- 21 January
- Shift
- Evening Shift
- Subject
- Chemistry
- Chapter
- Aldehydes and Ketones
JEE Main 2026 · 21 January · Evening Shift · Chemistry · Aldehydes and Ketones
Match List - I with List - II. List - I List - II Reagents Reaction...
Match List - I with List - II.
Choose the correct answer from the options given below :
| List - I | List - II |
| Reagents | 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 - Koch Reaction |
| D. CO, HCl, Anhyd. AlCl_{3} | IV. Stephen Reaction |
Choose the correct answer from the options given below :
Options
- AA-IV, B-III, C-I, D-II
- BA-II, B-IV, C-I, D-III
- CA-IV, B-I, C-II, D-III
- DA-II, B-III, C-IV, D-I
Correct answer
B. A-II, B-IV, C-I, D-III
Step-by-step solution
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