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Saturday, 10 October

JEE Main Chemistry · Organic Chemistry: Some Basic Principles and Techniques

Anion Analysis in JEE Main

Anion Analysis (Chemistry, Organic Chemistry: Some Basic Principles and Techniques) came 9 times in 9 of the 42 JEE Main shifts Lumi analysed, across 8 distinct ideas. 6 of them came in 2024–26; it was last asked in 2026.

Questions
9
in 9 shifts
Ideas asked
8
1 asked more than once
Numerical answer
1
11% of its questions
Pattern
Asked most years
last asked 2026
Questions each year
0241’170’201’210’221’234’241’251’26

In the shifts Lumi analysed for each year.

Difficulty and format
Easy 5Medium 4Hard 0

Format

  • Single correct7 Q
  • Numerical value1 Q
  • Match the list1 Q
Ideas inside the topic
8 ideas
Where it sits

Part of Organic Chemistry: Some Basic Principles and Techniques, which had 91 questions in all. Anion Analysis accounts for 10% of them. In Lumi's JEE taxonomy it belongs to Inorganic Chemistry.

Some questions sit in other chapters too: Aldehydes, Ketones and Carboxylic Acids, Practical Chemistry (Qualitative Analysis), Redox Reactions, The d- and f-Block Elements, The p-Block Elements.

Every question

All 9 Anion Analysis questions

Newest first, each with its options and official answer.

  1. 5 Apr 2026, Shift 2 · Q70A paper dipped in a dil. H2SO4\mathrm{H_2SO_4} solution of 'X' upon treatment with SO2\mathrm{SO_2} gas turns into green. The compound 'X' is :EasySingle correct
  2. 2 Apr 2025, Shift 2 · Q62Formation of Na4[Fe(CN)5NOS]\mathrm{Na_4[Fe(CN)_5NOS]}, a purple coloured complex formed by addition of sodium nitroprusside in sodium carbonate…EasySingle correct
  3. 6 Apr 2024, Shift 2 · Q72During the detection of acidic radical present in a salt, a student gets a pale yellow precipitate soluble with difficulty in…EasySingle correct
  4. 8 Apr 2024, Shift 1 · Q73Match List I with List II LIST I (Compound): A. Fe4[Fe(CN)6]3⋅xH2O\mathrm{Fe_4[Fe(CN)_6]_3\cdot xH_2O}; B. [Fe(CN)5NOS]4−[\mathrm{Fe(CN)_5NOS}]^{4-}; C.…MediumMatch the list
  5. 29 Jan 2024, Shift 1 · Q79In chromyl chloride test for confirmation of Cl−\mathrm{Cl^-} ion, a yellow solution is obtained. Acidification of the solution and…MediumSingle correct
  6. 31 Jan 2024, Shift 1 · Q90Molar mass of the salt from NaBr\mathrm{NaBr}, NaNO3\mathrm{NaNO_3}, KI\mathrm{KI} and CaF2\mathrm{CaF_2} which does not evolve coloured vapours…EasyNumerical value
  7. 11 Apr 2023, Shift 1 · Q80When a solution of mixture having two inorganic salts was treated with freshly prepared ferrous sulphate in acidic medium, a dark brown…EasySingle correct
  8. 3 Aug 2021, Shift 2 · Q42In the detection of nitrogen in an organic compound by Lassaigne's test, the iron compounds formed areMediumSingle correct
  9. 2 Apr 2017 (offline) · Q48Sodium salt of an organic acid 'X' produces effervescence with conc. H2SO4\mathrm{H_2SO_4}. 'X' reacts with the acidified aqueous…MediumSingle correct