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Saturday, 31 October

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

Sulfide Sodium Nitroprusside Test

JEE Main asked Sulfide Sodium Nitroprusside Test 4 times in 4 of the 108 shifts Lumi analysed, in 2021, 2022 and 2025. It belongs to Anion Analysis, in Organic Chemistry: Some Basic Principles and Techniques (Chemistry). The longest wait between two years asking it was 3 years. In 2021 it came in more than one shift of the same year.

Updated 2026-10-24

Times asked
4
in 4 shifts
Years
3 of 8
First asked
2021
last in 2025
Pattern
Comes in cycles
across the analysed shifts

Questions on this idea a shift, by year

2017–2026. Asked in 2021, 2022 and 2025. Years differ in how many shifts Lumi analysed, so each year is scaled to one shift of 25 Chemistry questions.

00.10.20’170’200.07’210.03’220’230’240.13’250’26

Raw count: 2017: 0 in 1 shift · 2020: 0 in 12 shifts · 2021: 2 in 24 shifts · 2022: 1 in 24 shifts · 2023: 0 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.

  • 20260 of 9
  • 20251 of 8
  • 20240 of 18
  • 20230 of 12
  • 20221 of 24
  • 20212 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 ion from colour test
  • Formula of coloured product in nitroprusside test

Difficulty

Easy 3Medium 1Hard 0

Every question was multiple choice.

Every question

All 4 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 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
  2. 28 Jun 2022, Shift 1 · Q80The formula of the purple colour formed in Laissaigne’s test for sulphur using sodium nitroprusside isEasySingle correct
  3. 26 Aug 2021, Shift 1 · Q41Which one of the following complexes is violet in colour ?MediumSingle correct
  4. 4 Aug 2021, Shift 2 · Q50The reagent that gives purple coloured complex with S2−\mathrm{S^{2-}} ion isEasySingle correct

Shifts: 4 Aug 2021, Shift 2, 26 Aug 2021, Shift 1, 28 Jun 2022, Shift 1, 2 Apr 2025, Shift 2.

Same topic

Other ideas in Anion Analysis

Anion Analysis has 13 ideas JEE Main has asked; 4 of them came up in more than one question.

Topic analysisChapter analysisStudy this chapterAll repeated ideas