JEE Main 2025 · ChemistryMultiple choiceSingle correctEasyRecall

JEE Main 2 April 2025, Shift 2, Chemistry Q62

Question 62 of 75 in this shift, Chemistry question 12 of 25, Section A.

Formation of

\mathrm{Na_4[Fe(CN)_5NOS]}

, a purple coloured complex formed by addition of sodium nitroprusside in sodium carbonate extract of salt indicates the presence of :

(1)Sulphate ion
(2)Sodium ion
(3)Sulphide ionOfficial answer
(4)Sulphite ion

Official answer

Option 3

NTA final key.

Chapter: Organic Chemistry: Some Basic Principles and Techniques
Topic: Anion Analysis
Idea tested: Sulfide Sodium Nitroprusside Test

Same topic in other shifts

All Anion Analysis questions

5 Apr 2026, Shift 2 · Q70A paper dipped in a dil. $\mathrm{H_2SO_4}$ solution of 'X' upon treatment with $\mathrm{SO_2}$ gas turns into green. The compound 'X' is :EasySingle correct
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
8 Apr 2024, Shift 1 · Q73Match List I with List II LIST I (Compound): A. $\mathrm{Fe_4[Fe(CN)_6]_3\cdot xH_2O}$ ; B. $[\mathrm{Fe(CN)_5NOS}]^{4-}$ ; C.…MediumMatch the list
29 Jan 2024, Shift 1 · Q79In chromyl chloride test for confirmation of $\mathrm{Cl^-}$ ion, a yellow solution is obtained. Acidification of the solution and…MediumSingle correct
31 Jan 2024, Shift 1 · Q90Molar mass of the salt from $\mathrm{NaBr}$ , $\mathrm{NaNO_3}$ , $\mathrm{KI}$ and $\mathrm{CaF_2}$ which does not evolve coloured vapours…EasyNumerical value
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

Question text from the official JEE Main paper published by NTA; answer from the final answer key. Chapter, topic and idea tags, difficulty and skill are Lumi’s. Lumi analyses 42 of the 174 JEE Main shifts held from 2017 to 2026.