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Saturday, 31 October

JEE Main · Chemistry · Alcohols, Phenols and Ethers

Lucas Test Differentiation

JEE Main asked Lucas Test Differentiation 3 times in 3 of the 108 shifts Lumi analysed, in 2020 and 2026. It belongs to Alcohols and Phenols, in Alcohols, Phenols and Ethers (Chemistry). The longest wait between two years asking it was 6 years. In 2020 it came in more than one shift of the same year.

Updated 2026-10-24

Times asked
3
in 3 shifts
Years
2 of 8
First asked
2020
last in 2026
Pattern
Occasional
across the analysed shifts

Questions on this idea a shift, by year

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

00.10.20’170.17’200’210’220’230’240’250.11’26

Raw count: 2017: 0 in 1 shift · 2020: 2 in 12 shifts · 2021: 0 in 24 shifts · 2022: 0 in 24 shifts · 2023: 0 in 12 shifts · 2024: 0 in 18 shifts · 2025: 0 in 8 shifts · 2026: 1 in 9 shifts.

Shift by shift

Each square is one analysed shift, in date order. Open a filled one for that paper.

  • 20261 of 9
  • 20250 of 8
  • 20240 of 18
  • 20230 of 12
  • 20220 of 24
  • 20210 of 24
  • 20202 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: multi-step.

  • Match list on organic functional-group tests
  • Identify ester from hydrolysis products and lucas test

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. 4 Apr 2026, Shift 2 · Q70Match the LIST-I with LIST-II List-I (Compound): A. [figure: cyclohexane ring bearing OH] B. [figure: cyclohexane ring bearing NH2] C.…MediumMatch the listHas a figure
  2. 4 Sep 2020, Shift 1 · Q39An organic compound (A) (molecular formula C6H12O2\mathrm{C_6H_{12}O_2}) was hydrolysed with dil. H2SO4\mathrm{H_2SO_4} to give a carboxylic acid…MediumDiagram basedHas a figure
  3. 2 Sep 2020, Shift 2 · Q45Two compounds A and B with same molecular formula (C3H6O\mathrm{C_3H_6O}) undergo Grignard’s reaction with methylmagnesium bromide to give…MediumSingle correctHas a figure

Shifts: 2 Sep 2020, Shift 2, 4 Sep 2020, Shift 1, 4 Apr 2026, Shift 2.

Same topic

Other ideas in Alcohols and Phenols

Alcohols and Phenols has 26 ideas JEE Main has asked; 13 of them came up in more than one question. The 12 most asked are below.

Topic analysisChapter analysisStudy this chapterAll repeated ideas