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Saturday, 31 October

JEE Main · Chemistry · Coordination Compounds

Precipitation Tests for Ionization Isomers

JEE Main asked Precipitation Tests for Ionization Isomers 8 times in 8 of the 108 shifts Lumi analysed, in 2017, 2020, 2021, 2022, 2023, 2025 and 2026. It belongs to Coordination Isomerism, in Coordination Compounds (Chemistry). The longest wait between two years asking it was 3 years, across 2018 and 2019, which Lumi has no shifts for. In 2022 it came in more than one shift of the same year.

Updated 2026-10-24

Times asked
8
in 8 shifts
Years
7 of 8
First asked
2017
last in 2026
Pattern
Asked most years
across the analysed shifts

Questions on this idea a shift, by year

2017–2026. Asked in 2017, 2020, 2021, 2022, 2023, 2025 and 2026. Years differ in how many shifts Lumi analysed, so each year is scaled to one shift of 25 Chemistry questions.

00.510.83’170.08’200.03’210.07’220.07’230’240.13’250.11’26

Raw count: 2017: 1 in 1 shift · 2020: 1 in 12 shifts · 2021: 1 in 24 shifts · 2022: 2 in 24 shifts · 2023: 1 in 12 shifts · 2024: 0 in 18 shifts · 2025: 1 in 8 shifts · 2026: 1 in 9 shifts.

Shift by shift

Each square is one analysed shift, in date order. Open a filled one for that paper.

  • 20261 of 9
  • 20251 of 8
  • 20240 of 18
  • 20231 of 12
  • 20222 of 24
  • 20211 of 24
  • 20201 of 12
  • 20171 of 1

Asked in that shift More than once Not asked

How JEE Main framed it

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

  • Moles of precipitate from complex
  • Identify type of isomerism from tests

Difficulty

Easy 4Medium 4Hard 0

5 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. 6 Apr 2026, Shift 2 · Q71An excess of AgNO3\mathrm{AgNO_3} is added to 100 mL of a 0.05 M solution of tetraaquadichloridochromium (III) chloride. The number of moles…EasyNumerical value
  2. 7 Apr 2025, Shift 1 · Q62An octahedral complex having molecular composition Co.5NH3.Cl.SO4\mathrm{Co.5NH_3.Cl.SO_4} has two isomers A and B. The solution of A gives a white…EasySingle correct
  3. 15 Apr 2023, Shift 1 · Q81The volume (in mL) of 0.1 M AgNO3\mathrm{AgNO_3} required for complete precipitation of chloride ions present in 20 mL of 0.01 M solution of…MediumNumerical value
  4. 30 Jun 2022, Shift 1 · Q71Correct formula of the compound which gives a white precipitate with BaCl2\mathrm{BaCl_2} solution, but not with AgNO3\mathrm{AgNO_3} solution, isEasySingle correct
  5. 29 Jun 2022, Shift 2 · Q87For the reaction given below : CoCl3⋅ x NH3+AgNO3\mathrm{CoCl_3\cdot}\,x\,\mathrm{NH_3 + AgNO_3} (aq) → If two equivalents of AgCl precipitate out, then…EasyNumerical value
  6. 3 Aug 2021, Shift 1 · Q59The number of ions produced in an aqueous solution from the octahedral complex with stoichiometry CoCl3.5H2O\mathrm{CoCl_3.5H_2O}, is ________.MediumNumerical value
  7. 8 Jan 2020, Shift 1 · Q49The volume (in mL) of 0.125 M AgNO3\mathrm{AgNO_3} required to quantitatively precipitate chloride ions in 0.3 g of…MediumNumerical value
  8. 2 Apr 2017 (offline) · Q50On treatment of 100 mL of 0.1 M solution of CoCl3.6H2O\mathrm{CoCl_3.6H_2O} with excess AgNO3\mathrm{AgNO_3}; 1.2×10221.2\times10^{22} ions are…MediumSingle correct

Shifts: 2 Apr 2017 (offline), 8 Jan 2020, Shift 1, 3 Aug 2021, Shift 1, 29 Jun 2022, Shift 2, 30 Jun 2022, Shift 1, 15 Apr 2023, Shift 1, 7 Apr 2025, Shift 1, 6 Apr 2026, Shift 2.

Same topic

Other ideas in Coordination Isomerism

Coordination Isomerism has 20 ideas JEE Main has asked; 8 of them came up in more than one question. The 12 most asked are below.

Topic analysisChapter analysisStudy this chapterAll repeated ideas