How can the black coating of copper oxide be removed chemically ? – InterviewSolution

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1.	How can the black coating of copper oxide be removed chemically ?
Answer» Solution :The black coating of copper oxide can be removed chemically by passing the HYDROGEN GAS over heated copper oxide. As a RESULT, the black coating turns brown in colour as oxygen is removed by hydrogen. `CuO+ H_(2) to Cu+H_(2)O`

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