JEE Main · Chemistry · The d- and f-Block Elements
Group II: Copper Ferrocyanide Test
JEE Main asked Group II: Copper Ferrocyanide Test once in the 108 shifts Lumi analysed, on 2 Apr 2025, Shift 1. It belongs to Cation Analysis, in The d- and f-Block Elements (Chemistry).
Updated 2026-10-24
- Times asked
- 1
- in 1 shift
- Years
- 1 of 8
- First asked
- 2025
- the only year
- Pattern
- New since 2024
- asked once so far
Questions on this idea a shift, by year
2017–2026. Asked in 2025. Years differ in how many shifts Lumi analysed, so each year is scaled to one shift of 25 Chemistry questions.
Raw count: 2017: 0 in 1 shift · 2020: 0 in 12 shifts · 2021: 0 in 24 shifts · 2022: 0 in 24 shifts · 2023: 0 in 12 shifts · 2024: 0 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.
How JEE Main framed it
Other is the usual form. Skill tested: recall.
- Choose correct tests with observations
Difficulty
The question was multiple choice.
Every question
The question
From the official JEE Main shift papers, newest first. Open one for the full question, the options and the official answer.
Shift: 2 Apr 2025, 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.
- Confirmatory Tests4× · 2024
- Cation Flame Colors3× · 2026
- Group IV Sulfides2× · 2026
- Group 0: Nessler's Reagent Complex Formula2× · 2025
- Group III Hydroxides2× · 2024
- Nickel DMG Complex2× · 2024
- Group Reagent Identificationonce · 2024
- Group I: Lead Chromate Testonce · 2023
- Group V Carbonate Precipitationonce · 2023
- AgCl Dissolution in Ammoniaonce · 2022
- Group IIA and IIB Sulfide Separationonce · 2021