On strongly heating, a blue salt leaves a black residue. Which of the following cations can be present in the salt? | Qualitative and Quantitative Analysis — Chem-Mantra | Chem-Mantra

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Question

On strongly heating, a blue salt leaves a black residue. Which of the following cations can be present in the salt?

Answer: C

💡 Solution & Explanation

Copper salts like CuSO4.5H2O are blue and upon strong heating decompose to leave a black residue of CuO.

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