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Saturday, 31 October

JEE Main · Chemistry · Practical Chemistry (Qualitative Analysis)

Cation Flame Colors

JEE Main asked Cation Flame Colors 3 times in 3 of the 108 shifts Lumi analysed, in 2022, 2024 and 2026. It belongs to Cation Analysis, in Practical Chemistry (Qualitative Analysis) (Chemistry). The longest wait between two years asking it was 2 years.

Updated 2026-10-24

Times asked
3
in 3 shifts
Years
3 of 8
First asked
2022
last in 2026
Pattern
Frequent
across the analysed shifts

Questions on this idea a shift, by year

2017–2026. Asked in 2022, 2024 and 2026. Years differ in how many shifts Lumi analysed, so each year is scaled to one shift of 25 Chemistry questions.

00.10.20’170’200’210.03’220’230.05’240’250.11’26

Raw count: 2017: 0 in 1 shift · 2020: 0 in 12 shifts · 2021: 0 in 24 shifts · 2022: 1 in 24 shifts · 2023: 0 in 12 shifts · 2024: 1 in 18 shifts · 2025: 0 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
  • 20250 of 8
  • 20241 of 18
  • 20230 of 12
  • 20221 of 24
  • 20210 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: recall.

  • Identify cation and anion from test observations
  • Match list on tests and reaction sequences

Difficulty

Easy 1Medium 2Hard 0

Every question was multiple choice.

Every question

All 3 questions

From the official JEE Main shift papers, newest first. Open one for the full question, the options and the official answer.

  1. 2 Apr 2026, Shift 1 · Q70A salt with few drops of conc. HCl gives apple green colour in flame test. The group precipitate of the salt is dissolved in acetic acid…MediumSingle correct
  2. 8 Apr 2024, Shift 1 · Q72Match List I with List II LIST I (Name of the test): A. Borax bead test; B. Charcoal cavity test; C. Cobalt nitrate test; D. Flame test…MediumMatch the list
  3. 24 Jun 2022, Shift 2 · Q80In the flame test of a mixture of salts, a green flame with blue centre was observed. Which one of the following cations may be present?EasySingle correct

Shifts: 24 Jun 2022, Shift 2, 8 Apr 2024, Shift 1, 2 Apr 2026, 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 analysisAll repeated ideas