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Saturday, 31 October

JEE Main · Chemistry · Aldehydes, Ketones and Carboxylic Acids

Rosenmund Reduction

JEE Main asked Rosenmund Reduction 6 times in 6 of the 108 shifts Lumi analysed, in 2020, 2021, 2022 and 2024. It belongs to Carboxylic Acids and Derivatives, in Aldehydes, Ketones and Carboxylic Acids (Chemistry). The longest wait between two years asking it was 2 years. In 2021 and 2022 it came in more than one shift of the same year.

Updated 2026-10-24

Times asked
6
in 6 shifts
Years
4 of 8
First asked
2020
last in 2024
Pattern
Comes in cycles
across the analysed shifts

Questions on this idea a shift, by year

2017–2026. Asked in 2020, 2021, 2022 and 2024. Years differ in how many shifts Lumi analysed, so each year is scaled to one shift of 25 Chemistry questions.

00.050.10’170.08’200.07’210.07’220’230.05’240’250’26

Raw count: 2017: 0 in 1 shift · 2020: 1 in 12 shifts · 2021: 2 in 24 shifts · 2022: 2 in 24 shifts · 2023: 0 in 12 shifts · 2024: 1 in 18 shifts · 2025: 0 in 8 shifts · 2026: 0 in 9 shifts.

Shift by shift

Each square is one analysed shift, in date order. Open a filled one for that paper.

  • 20260 of 9
  • 20250 of 8
  • 20241 of 18
  • 20230 of 12
  • 20222 of 24
  • 20212 of 24
  • 20201 of 12
  • 20170 of 1

Asked in that shift More than once Not asked

How JEE Main framed it

Match the list is the usual form. Skill tested: recall.

  • Match list on reagents for benzaldehyde preparation
  • Name of named reduction reaction

Difficulty

Easy 3Medium 3Hard 0

Every question was multiple choice.

Every question

All 6 questions

From the official JEE Main shift papers, newest first. Open one for the full question, the options and the official answer.

  1. 30 Jan 2024, Shift 1 · Q76[Reaction: benzoyl chloride (benzene ring bearing C(=O)Cl) →H2, Pd−BaSO4\xrightarrow{\mathrm{H_2,\ Pd-BaSO_4}} benzaldehyde (benzene ring bearing…EasySingle correctHas a figure
  2. 27 Jun 2022, Shift 1 · Q76Which of the following reactions will yield benzaldehyde as a product ? (A) [figure: benzene ring bearing COOH]…MediumOtherHas a figure
  3. 27 Jul 2022, Shift 2 · Q74Match **List - I** with **List - II**. List - I (A) C6H5COCl\mathrm{C_6H_5COCl} →Pd−BaSO4H2\xrightarrow[\mathrm{Pd-BaSO_4}]{\mathrm{H_2}}…MediumMatch the listHas a figure
  4. 25 Feb 2021, Shift 1 · Q45The major product of the following chemical reaction is : CH3CH2CN\mathrm{CH_3CH_2CN}…EasySingle correct
  5. 24 Feb 2021, Shift 2 · Q50Match List - I and List - II. List - I | List - II (a) R−C(=O)−Cl→R−CHO\mathrm{R-C(=O)-Cl \rightarrow R-CHO} | (i) Br2\mathrm{Br_2}/NaOH (b)…MediumMatch the listHas a figure
  6. 6 Sep 2020, Shift 2 · Q29The correct match between Item - I (starting material) and Item - II (reagent) for the preparation of benzaldehyde is : Item - I / Item -…EasyMatch the list

Shifts: 6 Sep 2020, Shift 2, 24 Feb 2021, Shift 2, 25 Feb 2021, Shift 1, 27 Jun 2022, Shift 1, 27 Jul 2022, Shift 2, 30 Jan 2024, Shift 1.

Same topic

Other ideas in Carboxylic Acids and Derivatives

Carboxylic Acids and Derivatives has 15 ideas JEE Main has asked; 11 of them came up in more than one question. The 12 most asked are below.

Topic analysisChapter analysisStudy this chapterAll repeated ideas