In the reaction, 2Cu + O2 → 2CuO, which substance is oxidised?
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A.
Copper Oxide (CuO)
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B.
Oxygen (O2)
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C.
Copper (Cu)
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D.
Both Cu and O2
Correct Answer:
C. Copper (Cu)
Explanation:
In the chemical reaction 2Cu + O2 → 2CuO, copper (Cu) reacts with oxygen to form copper(II) oxide. Oxidation is defined as the process where a substance gains oxygen or loses electrons. In this specific redox reaction, the elemental copper atoms gain oxygen atoms to become copper oxide. Because the copper is the species that undergoes this addition of oxygen, it is identified as the substance being oxidised.
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