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Saturday, 31 October

JEE Main · Chemistry · Organic Chemistry: Some Basic Principles and Techniques

Huckel's Rule

JEE Main asked Huckel's Rule 7 times in 7 of the 108 shifts Lumi analysed, in 2017, 2020, 2021, 2022 and 2023. It belongs to Resonance and Hyperconjugation, in Organic Chemistry: Some Basic Principles and Techniques (Chemistry). The longest wait between two years asking it was 3 years, across 2018 and 2019, which Lumi has no shifts for. In 2021 and 2022 it came in more than one shift of the same year.

Updated 2026-10-24

Times asked
7
in 7 shifts
Years
5 of 8
First asked
2017
last in 2023
Pattern
Asked most years
across the analysed shifts

Questions on this idea a shift, by year

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

00.510.83’170.08’200.07’210.07’220.07’230’240’250’26

Raw count: 2017: 1 in 1 shift · 2020: 1 in 12 shifts · 2021: 2 in 24 shifts · 2022: 2 in 24 shifts · 2023: 1 in 12 shifts · 2024: 0 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
  • 20240 of 18
  • 20231 of 12
  • 20222 of 24
  • 20212 of 24
  • 20201 of 12
  • 20171 of 1

Asked in that shift More than once Not asked

How JEE Main framed it

Diagram based is the usual form. Skill tested: conceptual.

  • Least resonance stabilised among ring structures
  • Statements on aromatic dianion product

Difficulty

Easy 1Medium 6Hard 0

Every question was multiple choice.

Every question

All 7 questions

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

  1. 12 Apr 2023, Shift 1 · Q74Correct statements for the given reaction are : [figure: 'A' -> 'B' with OH−^- (2eq)] A. Compound 'B' is aromatic B. The completion of…MediumOtherHas a figure
  2. 27 Jun 2022, Shift 2 · Q72Which of the following is most stable?MediumDiagram basedHas a figure
  3. 30 Jul 2022, Shift 2 · Q43Which of the following is unstable?MediumDiagram basedHas a figure
  4. 24 Feb 2021, Shift 2 · Q43Which one of the following compounds is non-aromatic ?EasySingle correctHas a figure
  5. 26 Aug 2021, Shift 2 · Q42Which one of the following compounds is not aromatic ?MediumDiagram basedHas a figure
  6. 8 Jan 2020, Shift 2 · Q41The major product in the following reaction is : [figure] + H3O⊕⟶+\ \mathrm{H_3O^{\oplus}} \longrightarrowMediumDiagram basedHas a figure
  7. 2 Apr 2017 (offline) · Q54Which of the following molecules is least resonance stabilized ?MediumSingle correctHas a figure

Shifts: 2 Apr 2017 (offline), 8 Jan 2020, Shift 2, 24 Feb 2021, Shift 2, 26 Aug 2021, Shift 2, 27 Jun 2022, Shift 2, 30 Jul 2022, Shift 2, 12 Apr 2023, Shift 1.

Same topic

Other ideas in Resonance and Hyperconjugation

Resonance and Hyperconjugation has 7 ideas JEE Main has asked; 5 of them came up in more than one question.

Topic analysisChapter analysisStudy this chapterAll repeated ideas