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Saturday, 31 October

JEE Main · Chemistry · Haloalkanes and Haloarenes

SN2 Transition State

JEE Main asked SN2 Transition State 4 times in 4 of the 108 shifts Lumi analysed, in 2022 and 2024. It belongs to SN1 and SN2 Mechanisms, in Haloalkanes and Haloarenes (Chemistry). The longest wait between two years asking it was 2 years. In 2022 and 2024 it came in more than one shift of the same year.

Updated 2026-10-24

Times asked
4
in 4 shifts
Years
2 of 8
First asked
2022
last in 2024
Pattern
Occasional
across the analysed shifts

Questions on this idea a shift, by year

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

00.050.10’170’200’210.07’220’230.09’240’250’26

Raw count: 2017: 0 in 1 shift · 2020: 0 in 12 shifts · 2021: 0 in 24 shifts · 2022: 2 in 24 shifts · 2023: 0 in 12 shifts · 2024: 2 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
  • 20242 of 18
  • 20230 of 12
  • 20222 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

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

  • Predict stereochemical product of substitution sequence
  • True statement selection on sn1/sn2 stereochemistry

Difficulty

Easy 2Medium 2Hard 0

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. 27 Jan 2024, Shift 1 · Q73The correct statement regarding nucleophilic substitution reaction in a chiral alkyl halide is :EasySingle correct
  2. 8 Apr 2024, Shift 2 · Q75Given below are two statements : Statement (I) : SN2\mathrm{S_N2} reactions are 'stereospecific', indicating that they result in the…EasyTwo statements
  3. 27 Jun 2022, Shift 1 · Q75The major product of the following reaction is : [figure: reactant drawn as a benzene ring with a substituent F ortho to a side chain and…MediumDiagram basedHas a figure
  4. 25 Jul 2022, Shift 1 · Q74Most stable product of the following reaction is : (i) p-toluenesulfonyl chloride (H3C−C6H4−SO2Cl\mathrm{H_3C{-}C_6H_4{-}SO_2Cl}), Pyridine (ii) NaCN,…MediumDiagram basedHas a figure

Shifts: 27 Jun 2022, Shift 1, 25 Jul 2022, Shift 1, 27 Jan 2024, Shift 1, 8 Apr 2024, Shift 2.

Same topic

Other ideas in SN1 and SN2 Mechanisms

SN1 and SN2 Mechanisms has 19 ideas JEE Main has asked; 12 of them came up in more than one question. The 12 most asked are below.

Topic analysisChapter analysisStudy this chapterAll repeated ideas