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Saturday, 31 October

JEE Main · Chemistry · Aldehydes, Ketones and Carboxylic Acids

Intramolecular Aldol

JEE Main asked Intramolecular Aldol 5 times in 5 of the 108 shifts Lumi analysed, in 2020, 2021, 2022, 2023 and 2025. It belongs to Aldol and Cannizzaro, in Aldehydes, Ketones and Carboxylic Acids (Chemistry). The longest wait between two years asking it was 2 years.

Updated 2026-10-24

Times asked
5
in 5 shifts
Years
5 of 8
First asked
2020
last in 2025
Pattern
Asked most years
across the analysed shifts

Questions on this idea a shift, by year

2017–2026. Asked in 2020, 2021, 2022, 2023 and 2025. Years differ in how many shifts Lumi analysed, so each year is scaled to one shift of 25 Chemistry questions.

00.10.20’170.08’200.03’210.03’220.07’230’240.13’250’26

Raw count: 2017: 0 in 1 shift · 2020: 1 in 12 shifts · 2021: 1 in 24 shifts · 2022: 1 in 24 shifts · 2023: 1 in 12 shifts · 2024: 0 in 18 shifts · 2025: 1 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
  • 20251 of 8
  • 20240 of 18
  • 20231 of 12
  • 20221 of 24
  • 20211 of 24
  • 20201 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: application.

  • Predict product of reaction
  • Identify reactant in reaction sequence

Difficulty

Easy 0Medium 5Hard 0

Every question was multiple choice.

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 2025, Shift 2 · Q68When [structure: CH3C(=O)CH2CH2CH2CH2CHO\mathrm{CH_3C(=O)CH_2CH_2CH_2CH_2CHO}, a skeletal zigzag chain with a methyl ketone at one end and an aldehyde (C=O…MediumSingle correctHas a figure
  2. 12 Apr 2023, Shift 1 · Q77[figure: Me−C(=O)\mathrm{Me-C(=O)}-(zig-zag chain)-C(=O)−CH3\mathrm{C(=O)-CH_3} --OEt−\mathrm{OEt^-}, Δ\Delta--> 'A' major Product] A in the above…MediumSingle correctHas a figure
  3. 30 Jun 2022, Shift 1 · Q76Which among the following will be the major product of the given reaction ? [structure: skeletal chain: a terminal bond to a C=O carbon (O…MediumDiagram basedHas a figure
  4. 26 Feb 2021, Shift 2 · Q44Identify A in the given chemical reaction. [structure drawn: benzene ring with two adjacent CH2CH2CHO\mathrm{CH_2CH_2CHO} substituents]…MediumDiagram basedHas a figure
  5. 9 Jan 2020, Shift 2 · Q44In the following reaction A is : A…MediumSingle correctHas a figure

Shifts: 9 Jan 2020, Shift 2, 26 Feb 2021, Shift 2, 30 Jun 2022, Shift 1, 12 Apr 2023, Shift 1, 8 Apr 2025, Shift 2.

Same topic

Other ideas in Aldol and Cannizzaro

Aldol and Cannizzaro has 9 ideas JEE Main has asked; 8 of them came up in more than one question.

Topic analysisChapter analysisStudy this chapterAll repeated ideas