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Saturday, 31 October

JEE Main · Chemistry · Hydrocarbons

Oxidative Cleavage with Hot KMnO4

JEE Main asked Oxidative Cleavage with Hot KMnO4 2 times in 2 of the 108 shifts Lumi analysed, all in 2022. It belongs to Alkenes and Alkynes, in Hydrocarbons (Chemistry). In 2022 it came in more than one shift of the same year.

Updated 2026-10-24

Times asked
2
in 2 shifts
Years
1 of 8
First asked
2022
the only year
Pattern
Occasional
across the analysed shifts

Questions on this idea a shift, by year

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

00.050.10’170’200’210.07’220’230’240’250’26

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: 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
  • 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

Numerical value is the usual form. Skill tested: application.

  • Identify alkene from oxidation products
  • Count hydrocarbons giving same oxidation product

Difficulty

Easy 0Medium 1Hard 1

1 of the 2 questions had a numerical answer.

Every question

All 2 questions

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

  1. 29 Jun 2022, Shift 1 · Q73Two isomers 'A' and 'B' with molecular formula C4H8\mathrm{C_4H_8} give different products on oxidation with KMnO4\mathrm{KMnO_4} in acidic…MediumSingle correct
  2. 30 Jul 2022, Shift 2 · Q60Among the following, how many hydrocarbon (s) with formula C10 H16\mathrm{C_{10}\,H_{16}} which on reaction with acidic potassium permagenate…HardNumerical valueHas a figure

Shifts: 29 Jun 2022, Shift 1, 30 Jul 2022, Shift 2.

Same topic

Other ideas in Alkenes and Alkynes

Alkenes and Alkynes has 24 ideas JEE Main has asked; 14 of them came up in more than one question. The 12 most asked are below.

Topic analysisChapter analysisStudy this chapterAll repeated ideas