Which of the following is formed in solution when [Cu(NH3)4]2+ is treated with KCN till the colour of the complex is discharged? | Qualitative and Quantitative Analysis — Chem-Mantra | Chem-Mantra

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Question

Which of the following is formed in solution when [Cu(NH3)4]2+ is treated with KCN till the colour of the complex is discharged?

Answer: C

💡 Solution & Explanation

Cu2+ is reduced to Cu+ by CN- and forms the stable, colourless complex ion [Cu(CN)4]3-.

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