A solution gives a deep violet/purple coloration when treated with alkaline sodium nitroprusside. Th — Qualitative and Quantitative Analysis Chemistry Question
Question
A solution gives a deep violet/purple coloration when treated with alkaline sodium nitroprusside. The anion present in the solution is:
Answer: B
💡 Solution & Explanation
Sulphide ions ($S^{2-}$) react with sodium nitroprusside ($Na_2[Fe(CN)_5NO]$) to form a deep violet thionitrosyl complex, $[Fe(CN)_5NOS]^{4-}$.
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