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Saturday, 31 October

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

Oxidation State Trends

JEE Main asked Oxidation State Trends 8 times in 8 of the 108 shifts Lumi analysed, in 2021, 2023, 2024 and 2025. 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 2021 and 2024 it came in more than one shift of the same year.

Updated 2026-10-24

Times asked
8
in 8 shifts
Years
4 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, 2024 and 2025. Years differ in how many shifts Lumi analysed, so each year is scaled to one shift of 25 Chemistry questions.

00.10.20’170’200.07’210’220.07’230.19’240.13’250’26

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: 4 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
  • 20244 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: conceptual.

  • Statement i/ii on group 6 oxidation states
  • Statement i/ii on transition element properties

Difficulty

Easy 5Medium 3Hard 0

1 of the 8 questions had a numerical answer.

Every question

All 8 questions

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

  1. 3 Apr 2025, Shift 2 · Q61Given below are two statements: Statement I : CrO3\mathrm{CrO_3} is a stronger oxidizing agent than MoO3\mathrm{MoO_3} Statement II : Cr(VI)…MediumTwo statements
  2. 1 Feb 2024, Shift 2 · Q69Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : In aqueous…MediumAssertion–reason
  3. 9 Apr 2024, Shift 2 · Q69Give below are two statements : Statement I : The higher oxidation states are more stable down the group among transition elements unlike…MediumTwo statements
  4. 5 Apr 2024, Shift 1 · Q69The metal that shows highest and maximum number of oxidation state is :EasySingle correct
  5. 4 Apr 2024, Shift 1 · Q69The element which shows only one oxidation state other than its elemental form is :EasySingle correct
  6. 8 Apr 2023, Shift 2 · Q89The sum of oxidation state of the metals in Fe(CO)5\mathrm{Fe(CO)_5}, VO2+\mathrm{VO^{2+}} and WO3\mathrm{WO_3} is ____________.EasyNumerical value
  7. 17 Mar 2021, Shift 2 · Q39The common positive oxidation states for an element with atomic number 24, are :EasySingle correct
  8. 25 Jul 2021, Shift 1 · Q38The correct order of following 3d metal oxides, according to their oxidation numbers is : (a) CrO3\mathrm{CrO_3} (b) Fe2O3\mathrm{Fe_2O_3} (c)…EasyOther

Shifts: 17 Mar 2021, Shift 2, 25 Jul 2021, Shift 1, 8 Apr 2023, Shift 2, 1 Feb 2024, Shift 2, 4 Apr 2024, Shift 1, 5 Apr 2024, Shift 1, 9 Apr 2024, Shift 2, 3 Apr 2025, Shift 2.

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