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Saturday, 31 October

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

Resonance Structures

JEE Main asked Resonance Structures 3 times in 3 of the 108 shifts Lumi analysed, all in 2021. It belongs to Resonance and Hyperconjugation, in Organic Chemistry: Some Basic Principles and Techniques (Chemistry). In 2021 it came in more than one shift of the same year.

Updated 2026-10-24

Times asked
3
in 3 shifts
Years
1 of 8
First asked
2021
the only year
Pattern
Gone quiet
across the analysed shifts

Questions on this idea a shift, by year

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

00.050.10’170’200.10’210’220’230’240’250’26

Raw count: 2017: 0 in 1 shift · 2020: 0 in 12 shifts · 2021: 3 in 24 shifts · 2022: 0 in 24 shifts · 2023: 0 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
  • 20230 of 12
  • 20220 of 24
  • 20213 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: conceptual.

  • Identify incorrect resonance structure
  • Species with one pi bond and most canonical forms

Difficulty

Easy 0Medium 3Hard 0

Every question was multiple choice.

Every question

All 3 questions

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

  1. 25 Jul 2021, Shift 2 · Q38Identify the species having one π\pi-bond and maximum number of canonical forms from the following :MediumSingle correct
  2. 25 Jul 2021, Shift 1 · Q41Which one among the following resonating structures is not correct ?MediumDiagram basedHas a figure
  3. 22 Jul 2021, Shift 2 · Q43Which one of the following compounds does not exhibit resonance ?MediumSingle correctHas a figure

Shifts: 22 Jul 2021, Shift 2, 25 Jul 2021, Shift 2, 25 Jul 2021, 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