JEE Main · Chemistry · Hydrogen
Group 0: Nessler's Reagent Complex Formula
JEE Main asked Group 0: Nessler's Reagent Complex Formula 2 times in 2 of the 108 shifts Lumi analysed, in 2023 and 2025. It belongs to Cation Analysis, in Hydrogen (Chemistry). The longest wait between two years asking it was 2 years.
Updated 2026-10-24
- Times asked
- 2
- in 2 shifts
- Years
- 2 of 8
- First asked
- 2023
- last in 2025
- Pattern
- Occasional
- across the analysed shifts
Questions on this idea a shift, by year
2017–2026. Asked in 2023 and 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: 1 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
Single correct is the usual form. Skill tested: recall.
- Reagent identification
- Element absent in a named reagent
Difficulty
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.
- 7 Apr 2025, Shift 1 · Q63When a salt is treated with sodium hydroxide solution it gives gas X. On passing gas X through reagent Y a brown coloured precipitate is…EasySingle correct
- 6 Apr 2023, Shift 2 · Q74Element not present in Nessler's reagent isEasySingle correct
Shifts: 6 Apr 2023, Shift 2, 7 Apr 2025, Shift 1.
Same topic
Other ideas in Cation Analysis
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- Cation Flame Colors3× · 2026
- Group IV Sulfides2× · 2026
- Group III Hydroxides2× · 2024
- Nickel DMG Complex2× · 2024
- Group II: Copper Ferrocyanide Testonce · 2025
- 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