What will be the colour of the solution when Mn(OH)2 is treated with concentrated HNO3 and sodium bismuthate (or red lead or lead dioxide)? | Qualitative and Quantitative Analysis — Chem-Mantra | Chem-Mantra

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Question

What will be the colour of the solution when Mn(OH)2 is treated with concentrated HNO3 and sodium bismuthate (or red lead or lead dioxide)?

Answer: B

💡 Solution & Explanation

Mn2+ is oxidized to purple MnO4^- by strong oxidizing agents like sodium bismuthate in acidic medium.

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