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Saturday, 31 October

JEE Main · Chemistry · Coordination Compounds

Group III Hydroxides

JEE Main asked Group III Hydroxides 2 times in 2 of the 108 shifts Lumi analysed, in 2021 and 2024. It belongs to Cation Analysis, in Coordination Compounds (Chemistry). The longest wait between two years asking it was 3 years.

Updated 2026-10-24

Times asked
2
in 2 shifts
Years
2 of 8
First asked
2021
last in 2024
Pattern
Occasional
across the analysed shifts

Questions on this idea a shift, by year

2017–2026. Asked in 2021 and 2024. Years differ in how many shifts Lumi analysed, so each year is scaled to one shift of 25 Chemistry questions.

00.050.10’170’200.03’210’220’230.05’240’250’26

Raw count: 2017: 0 in 1 shift · 2020: 0 in 12 shifts · 2021: 1 in 24 shifts · 2022: 0 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
  • 20220 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

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

  • Nh4cl common ion lowers oh- before group iii precipitation
  • Product of reagent on cation solution

Difficulty

Easy 1Medium 1Hard 0

Every question was multiple choice.

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. 4 Apr 2024, Shift 1 · Q72In the precipitation of the iron group (III) in qualitative analysis, ammonium chloride is added before adding ammonium hydroxide to :MediumSingle correct
  2. 27 Aug 2021, Shift 2 · Q50The addition of dilute NaOH to Cr3+\mathrm{Cr^{3+}} salt solution will give :EasySingle correct

Shifts: 27 Aug 2021, Shift 2, 4 Apr 2024, Shift 1.

Same topic

Other ideas in Cation Analysis

Cation Analysis has 12 ideas JEE Main has asked; 6 of them came up in more than one question.

Topic analysisChapter analysisStudy this chapterAll repeated ideas