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In the reaction 2Cu + O2 --heat--> 2CuO, what is happening to the copper?

Question
In the reaction 2Cu + O2 --heat--> 2CuO, what is happening to the copper?
It is being reduced
It is being oxidised
It is being displaced
It is being precipitated
Answer
It is being oxidised
Detailed Explanation
Copper gains oxygen to form copper oxide in this reaction, so the copper is being oxidised.
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