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Saturday, 31 October

JEE Main · Chemistry · Redox Reactions

Permanganate n-Factor Across Media

JEE Main asked Permanganate n-Factor Across Media 6 times in 6 of the 108 shifts Lumi analysed, in 2021, 2022 and 2023. It belongs to Redox Reactions (Chemistry). The longest wait between two years asking it was 1 year. In 2023 it came in more than one shift of the same year.

Updated 2026-10-24

Times asked
6
in 6 shifts
Years
3 of 8
First asked
2021
last in 2023
Pattern
Comes in cycles
across the analysed shifts

Questions on this idea a shift, by year

2017–2026. Asked in 2021, 2022 and 2023. Years differ in how many shifts Lumi analysed, so each year is scaled to one shift of 25 Chemistry questions.

00.150.30’170’200.03’210.03’220.28’230’240’250’26

Raw count: 2017: 0 in 1 shift · 2020: 0 in 12 shifts · 2021: 1 in 24 shifts · 2022: 1 in 24 shifts · 2023: 4 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
  • 20234 of 12
  • 20221 of 24
  • 20211 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: calculation.

  • Medium for permanganate reaction from oxidation state change
  • Electrons gained by permanganate in alkaline medium

Difficulty

Easy 4Medium 1Hard 1

4 of the 6 questions had a numerical answer.

Every question

All 6 questions

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

  1. 15 Apr 2023, Shift 1 · Q88The total change in the oxidation state of manganese involved in the reaction of KMnO4\mathrm{KMnO_4} and potassium iodide in the acidic…EasyNumerical value
  2. 13 Apr 2023, Shift 1 · Q81KMnO4\mathrm{KMnO_4} is titrated with ferrous ammonium sulphate hexahydrate in presence of dilute H2SO4\mathrm{H_2SO_4}. Number of water…EasyNumerical value
  3. 10 Apr 2023, Shift 2 · Q90In alkaline medium, the reduction of permanganate anion involves a gain of ____________ electrons.EasyNumerical value
  4. 6 Apr 2023, Shift 2 · Q69During the reaction of permanganate with thiosulphate, the change in oxidation of manganese occurs by value of 3. Identify which of the…MediumSingle correct
  5. 26 Jul 2022, Shift 1 · Q69The dark purple colour of KMnO4\mathrm{KMnO_4} disappears in the titration with oxalic acid in acidic medium. The overall change in the…EasySingle correct
  6. 26 Feb 2021, Shift 2 · Q59In mildly alkaline medium, thiosulphate ion is oxidized by MnO4−\mathrm{MnO_4^-} to "A". The oxidation state of sulphur in "A" is __________.HardNumerical value

Shifts: 26 Feb 2021, Shift 2, 26 Jul 2022, Shift 1, 6 Apr 2023, Shift 2, 10 Apr 2023, Shift 2, 13 Apr 2023, Shift 1, 15 Apr 2023, Shift 1.

Same topic

Other ideas in Redox Reactions

Redox Reactions has 16 ideas JEE Main has asked; 10 of them came up in more than one question. The 12 most asked are below.

Topic analysisChapter analysisStudy this chapterAll repeated ideas