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Chemistry · Practical Inorganic chemistry (Qualitative Analysis)

JEE Main 2025 — 2 April, Evening Shift — Question 4

Formation of Na4[Fe(CN)5NOS]\mathrm{Na}_{4}\left[\mathrm{Fe}(\mathrm{CN})_{5} \mathrm{NOS}\right], a purple coloured complex formed by addition of sodium nitroprusside in sodium carbonate extract of salt indicates the presence of

  1. Option A:

    Sulphate ion

  2. Option B:

    Sulphide ion

    Correct
  3. Option C:

    Sulphite ion

  4. Option D:

    Sodium ion

Answer: B

Step-by-step solution

Test for sulphide ion

Solution figure

Answer key and solution verified before publishing.

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Exam
JEE Main 2025
Paper
2 April, Evening Shift
Subject
Chemistry
Chapter
Practical Inorganic chemistry (Qualitative Analysis)
Topic
Other Misc Reactions/ Tests
Formation of Na 4 [ Fe ( CN ) 5 NOS ] , a purple coloured complex… | JEE Main 2025 PYQ with Solution · DhiX AI