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Saturday, 31 October

JEE Main · Chemistry · The d- and f-Block Elements

Specific KMnO4 Oxidations in Neutral/Alkaline Medium

JEE Main asked Specific KMnO4 Oxidations in Neutral/Alkaline Medium 4 times in 3 of the 108 shifts Lumi analysed, in 2022 and 2024. It belongs to d-Block Elements, in The d- and f-Block Elements (Chemistry). The longest wait between two years asking it was 2 years. In 2022 it came in more than one shift of the same year.

Updated 2026-10-24

Times asked
4
in 3 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.

00.050.10’170’200’210.10’220’230.05’240’250’26

Raw count: 2017: 0 in 1 shift · 2020: 0 in 12 shifts · 2021: 0 in 24 shifts · 2022: 3 in 24 shifts · 2023: 0 in 12 shifts · 2024: 1 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
  • 20241 of 18
  • 20230 of 12
  • 202222 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

Single correct is the usual form. Skill tested: recall.

  • Predict product of oxidation by reagent
  • Change in oxidation state of manganese in neutral medium oxidation

Difficulty

Easy 0Medium 4Hard 0

1 of the 4 questions had a numerical answer.

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. 29 Jan 2024, Shift 1 · Q68In alkaline medium, MnO4−\mathrm{MnO_4^-} oxidises I−\mathrm{I^-} toMediumSingle correct
  2. 29 Jul 2022, Shift 1 · Q70In neutral or faintly alkaline medium, KMnO4\mathrm{KMnO_4} being a powerful oxidant can oxidize, thiosulphate almost quantitatively, to…MediumSingle correct
  3. 27 Jul 2022, Shift 2 · Q69In neutral or alkaline solution, MnO4−\mathrm{MnO_4^-} oxidises thiosulphate to :MediumSingle correct
  4. 27 Jul 2022, Shift 2 · Q87The oxidation state of manganese in the product obtained in a reaction of potassium permanganate and hydrogen peroxide in basic medium is…MediumNumerical value

Shifts: 27 Jul 2022, Shift 2, 29 Jul 2022, Shift 1, 29 Jan 2024, Shift 1.

Same topic

Other ideas in d-Block Elements

d-Block Elements has 31 ideas JEE Main has asked; 21 of them came up in more than one question. The 12 most asked are below.

Topic analysisChapter analysisStudy this chapterAll repeated ideas