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Saturday, 31 October

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

Chromate-Dichromate pH Equilibrium

JEE Main asked Chromate-Dichromate pH Equilibrium 2 times in 2 of the 108 shifts Lumi analysed, all in 2021. It belongs to d-Block Elements, in The d- and f-Block Elements (Chemistry). In 2021 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
2021
the only year
Pattern
Gone quiet
across the analysed shifts

Questions on this idea a shift, by year

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

00.050.10’170’200.07’210’220’230’240’250’26

Raw count: 2017: 0 in 1 shift · 2020: 0 in 12 shifts · 2021: 2 in 24 shifts · 2022: 0 in 24 shifts · 2023: 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
  • 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

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

  • Product of chromate with hydrogen peroxide
  • Oxidation state of cr after treating dichromate with base

Difficulty

Easy 1Medium 1Hard 0

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. 26 Feb 2021, Shift 1 · Q59Dichromate ion is treated with base, the oxidation number of Cr in the product formed is __________.EasyNumerical value
  2. 3 Aug 2021, Shift 1 · Q35Sodium chromate reacts with hydrogen peroxide (H2O2\mathrm{H_2O_2}) in the presence of dilute sulphuric acid to yieldMediumSingle correct

Shifts: 26 Feb 2021, Shift 1, 3 Aug 2021, 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