Chem Mantra
⚗️ Chem-MantraNEET Chemistry →
Practical Organic Chemistry and PurificationmediumMCQ SINGLE⭐ Must-Do

In the qualitative test for sulphur, the addition of sodium nitroprusside to the Lassaigne's extract — Practical Organic Chemistry and Purification Chemistry Question

Question

In the qualitative test for sulphur, the addition of sodium nitroprusside to the Lassaigne's extract yields a deep violet color due to the formation of:

Answer: A

💡 Solution & Explanation

The sulphide ion reacts with sodium nitroprusside to form the highly colored complex sodium thionitroprusside, $Na_4[Fe(CN)_5NOS]$.

💬
Still have doubts about this question?
Send it to our AI chemistry tutor on WhatsApp — gets answered in minutes
Ask on WhatsApp →

Practice 22,000+ questions like this

AI-adaptive practice, video lectures, and full NEET Chemistry content — all in one place.

Explore Courses →Free on YouTube

JEE Advanced · JEE Mains · NEET · IChO · AP Chemistry