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Saturday, 31 October

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

Preparation Steps of Potassium Dichromate

JEE Main asked Preparation Steps of Potassium Dichromate 3 times in 3 of the 108 shifts Lumi analysed, in 2022, 2023 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 1 year.

Updated 2026-10-24

Times asked
3
in 3 shifts
Years
3 of 8
First asked
2022
last in 2024
Pattern
Comes in cycles
across the analysed shifts

Questions on this idea a shift, by year

2017–2026. Asked in 2022, 2023 and 2024. Years differ in how many shifts Lumi analysed, so each year is scaled to one shift of 25 Chemistry questions.

00.050.10’170’200’210.03’220.07’230.05’240’250’26

Raw count: 2017: 0 in 1 shift · 2020: 0 in 12 shifts · 2021: 0 in 24 shifts · 2022: 1 in 24 shifts · 2023: 1 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
  • 20231 of 12
  • 20221 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: multi-step.

  • Atoms of a type in product of reaction
  • Spin only moments of chromite fusion products

Difficulty

Easy 0Medium 3Hard 0

2 of the 3 questions had a numerical answer.

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. 5 Apr 2024, Shift 2 · Q86The fusion of chromite ore with sodium carbonate in the presence of air leads to the formation of products A and B along with the…MediumNumerical value
  2. 10 Apr 2023, Shift 1 · Q79Given below are two statements: Statement I : Aqueous solution of K2Cr2O7\mathrm{K_2Cr_2O_7} is preferred as a primary standard in volumetric…MediumTwo statements
  3. 29 Jun 2022, Shift 1 · Q86The number of terminal oxygen atoms present in the product B obtained from the following reaction is ____________.…MediumNumerical value

Shifts: 29 Jun 2022, Shift 1, 10 Apr 2023, Shift 1, 5 Apr 2024, 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