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Saturday, 31 October

JEE Main · Chemistry · Aldehydes, Ketones and Carboxylic Acids

Gattermann-Koch Formylation

JEE Main asked Gattermann-Koch Formylation 5 times in 5 of the 108 shifts Lumi analysed, in 2021, 2024 and 2026. It belongs to Aromatic Hydrocarbons, in Aldehydes, Ketones and Carboxylic Acids (Chemistry). The longest wait between two years asking it was 3 years. In 2021 and 2024 it came in more than one shift of the same year.

Updated 2026-10-24

Times asked
5
in 5 shifts
Years
3 of 8
First asked
2021
last in 2026
Pattern
Frequent
across the analysed shifts

Questions on this idea a shift, by year

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

00.10.20’170’200.07’210’220’230.09’240’250.11’26

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

Shift by shift

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

  • 20261 of 9
  • 20250 of 8
  • 20242 of 18
  • 20230 of 12
  • 20220 of 24
  • 20212 of 24
  • 20200 of 12
  • 20170 of 1

Asked in that shift More than once Not asked

How JEE Main framed it

Single correct is the usual form. Skill tested: multi-step.

  • Pi electrons in product of named reactions
  • Name reaction identification

Difficulty

Easy 2Medium 3Hard 0

2 of the 5 questions had a numerical answer.

Every question

All 5 questions

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

  1. 8 Apr 2026, Shift 2 · Q72'xx' is the product which is obtained from benzene by reacting it with carbon monoxide and hydrogen chloride in the presence of cuprous…MediumNumerical value
  2. 31 Jan 2024, Shift 2 · Q78Identify the name reaction. [reaction: benzene + CO, HCl --(anhydrous AlCl3_3/CuCl)--> benzaldehyde (C6_6H5_5CHO)]EasySingle correctHas a figure
  3. 9 Apr 2024, Shift 1 · Q75Identify major product "X" formed in the following reaction : [figure: benzene…EasySingle correctHas a figure
  4. 25 Feb 2021, Shift 1 · Q59Consider the following chemical reaction. CH≡CH\mathrm{CH{\equiv}CH}…MediumNumerical value
  5. 3 Aug 2021, Shift 2 · Q46Which one of the following reagents are not suitable for the preparation of benzaldehyde from benzene?MediumSingle correct

Shifts: 25 Feb 2021, Shift 1, 3 Aug 2021, Shift 2, 31 Jan 2024, Shift 2, 9 Apr 2024, Shift 1, 8 Apr 2026, Shift 2.

Same topic

Other ideas in Aromatic Hydrocarbons

Aromatic Hydrocarbons has 21 ideas JEE Main has asked; 14 of them came up in more than one question. The 12 most asked are below.

Topic analysisChapter analysisStudy this chapterAll repeated ideas