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Saturday, 31 October

JEE Main · Chemistry · Alcohols, Phenols and Ethers

Williamson Synthesis Limits

JEE Main asked Williamson Synthesis Limits 4 times in 4 of the 108 shifts Lumi analysed, in 2021, 2023 and 2025. It belongs to Ethers, in Alcohols, Phenols and Ethers (Chemistry). The longest wait between two years asking it was 2 years. In 2021 it came in more than one shift of the same year.

Updated 2026-10-24

Times asked
4
in 4 shifts
Years
3 of 8
First asked
2021
last in 2025
Pattern
Comes in cycles
across the analysed shifts

Questions on this idea a shift, by year

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

00.10.20’170’200.07’210’220.07’230’240.13’250’26

Raw count: 2017: 0 in 1 shift · 2020: 0 in 12 shifts · 2021: 2 in 24 shifts · 2022: 0 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
  • 20220 of 24
  • 20212 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: application.

  • Reagent pair failing williamson ether synthesis
  • Reagent identification

Difficulty

Easy 1Medium 3Hard 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. 8 Apr 2025, Shift 2 · Q67Which one of the following reactions will not lead to the desired ether formation in major proportion ? (iso-Bu ⇒ isobutyl, sec-Bu ⇒…MediumSingle correctHas a figure
  2. 10 Apr 2023, Shift 1 · Q75Suitable reaction condition for preparation of Methyl phenyl ether isEasySingle correct
  3. 27 Aug 2021, Shift 2 · Q41The major product of the following reaction, if it occurs by SN2\mathrm{S_N2} mechanism is : [reaction drawn: a benzene ring bearing OH,…MediumDiagram basedHas a figure
  4. 27 Aug 2021, Shift 1 · Q45Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : Synthesis of…MediumAssertion–reason

Shifts: 27 Aug 2021, Shift 2, 27 Aug 2021, Shift 1, 10 Apr 2023, Shift 1, 8 Apr 2025, Shift 2.

Same topic

Other ideas in Ethers

Ethers has 7 ideas JEE Main has asked; 2 of them came up in more than one question.

Topic analysisChapter analysisStudy this chapterAll repeated ideas