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Saturday, 31 October

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

Carbocation Stability

JEE Main asked Carbocation Stability 4 times in 4 of the 108 shifts Lumi analysed, in 2022, 2023, 2024 and 2025. It belongs to Inductive and Electromeric Effects, in Organic Chemistry: Some Basic Principles and Techniques (Chemistry). The longest wait between two years asking it was 1 year.

Updated 2026-10-24

Times asked
4
in 4 shifts
Years
4 of 8
First asked
2022
last in 2025
Pattern
Comes in cycles
across the analysed shifts

Questions on this idea a shift, by year

2017–2026. Asked in 2022, 2023, 2024 and 2025. Years differ in how many shifts Lumi analysed, so each year is scaled to one shift of 25 Chemistry questions.

00.10.20’170’200’210.03’220.07’230.05’240.13’250’26

Raw count: 2017: 0 in 1 shift · 2020: 0 in 12 shifts · 2021: 0 in 24 shifts · 2022: 1 in 24 shifts · 2023: 1 in 12 shifts · 2024: 1 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
  • 20241 of 18
  • 20231 of 12
  • 20221 of 24
  • 20210 of 24
  • 20200 of 12
  • 20170 of 1

Asked in that shift More than once Not asked

How JEE Main framed it

Other is the usual form. Skill tested: conceptual.

  • Order/ranking of carbocation stability
  • Select pairs with first ion more stable

Difficulty

Easy 1Medium 1Hard 2

Every question was multiple choice.

Every question

All 4 questions

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

  1. 4 Apr 2025, Shift 2 · Q63In which pairs, the first ion is more stable than the second ? (A) [figure: 1-methoxycyclohexyl cation] & [figure: 1-methylcyclohexyl…MediumOtherHas a figure
  2. 30 Jan 2024, Shift 2 · Q73The correct stability order of carbocations isEasySingle correct
  3. 10 Apr 2023, Shift 2 · Q73The decreasing order of hydride affinity for following carbocations is: A. CH2=CH−C+(CH3)−CH3\mathrm{CH_2=CH-\overset{+}{C}(CH_3)-CH_3} (carbocation…HardOtherHas a figure
  4. 24 Jun 2022, Shift 2 · Q73Arrange the following carbocations in decreasing order of stability.HardDiagram basedHas a figure

Shifts: 24 Jun 2022, Shift 2, 10 Apr 2023, Shift 2, 30 Jan 2024, Shift 2, 4 Apr 2025, Shift 2.

Same topic

Other ideas in Inductive and Electromeric Effects

Inductive and Electromeric Effects has 5 ideas JEE Main has asked; 2 of them came up in more than one question.

Topic analysisChapter analysisStudy this chapterAll repeated ideas