Learn

Friday, 9 October

JEE Main Chemistry · Practical Chemistry (Qualitative Analysis)

Cation Analysis in JEE Main

Cation Analysis (Chemistry, Practical Chemistry (Qualitative Analysis)) came 10 times in 10 of the 42 JEE Main shifts Lumi analysed, across 7 distinct ideas. 7 of them came in 2024–26; it was last asked in 2026.

Questions
10
in 10 shifts
Ideas asked
7
3 asked more than once
Numerical answer
2
20% of its questions
Pattern
Asked most years
last asked 2026
Questions each year
0240’170’201’211’221’233’242’252’26

In the shifts Lumi analysed for each year.

Difficulty and format
Easy 3Medium 5Hard 2

Format

  • Single correct5 Q
  • Numerical value2 Q
  • Match the list2 Q
  • Other1 Q
Ideas inside the topic
7 ideas
Where it sits

Part of Practical Chemistry (Qualitative Analysis), which had 6 questions in all. Cation Analysis accounts for 167% of them. In Lumi's JEE taxonomy it belongs to Inorganic Chemistry.

Some questions sit in other chapters too: Coordination Compounds, Equilibrium, Hydrogen, Organic Chemistry: Some Basic Principles and Techniques, The d- and f-Block Elements.

Every question

All 10 Cation Analysis questions

Newest first, each with its options and 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. 4 Apr 2026, Shift 2 · Q69Among Fe3+\mathrm{Fe^{3+}}, Pb2+\mathrm{Pb^{2+}}, Cu2+\mathrm{Cu^{2+}} and Mn2+\mathrm{Mn^{2+}}, identify the one that gets precipitated out while…MediumSingle correct
  3. 2 Apr 2025, Shift 1 · Q62Choose the correct tests with respective observations. (A) CuSO4\mathrm{CuSO_4} (acidified with acetic acid) +…MediumOther
  4. 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
  5. 6 Apr 2024, Shift 2 · Q87Consider the following reactions NiS+HNO3+HCl→A+NO+S+H2O\mathrm{NiS + HNO_3 + HCl \rightarrow A + NO + S + H_2O}…HardNumerical value
  6. 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
  7. 9 Apr 2024, Shift 2 · Q87Consider the following test for a group-IV cation. M2++H2S→A\mathrm{M^{2+} + H_2S \rightarrow A} (Black precipitate) + byproduct A\mathrm{A} +…HardNumerical value
  8. 13 Apr 2023, Shift 2 · Q73In the wet tests for detection of various cations by precipitation, Ba2+\mathrm{Ba^{2+}} cations are detected by obtaining precipitate ofEasySingle correct
  9. 24 Jun 2022, Shift 1 · Q80During the qualitative analysis of salt with cation y2+y^{2+}, addition of a reagent (X) to alkaline solution of the salt gives a bright…EasySingle correct
  10. 3 Aug 2021, Shift 2 · Q48Match List I with II List I | List II (Ion detected) A. Borax Bead test | I. As3+\mathrm{As^{3+}} B. Charcoal cavity test | II.…MediumMatch the list