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The reaction 2 Cu + O2 → 2 CuO has long been called an oxidation-reaction. Copper also reacts with chlorine:


Cu + Cl2 → CuCl2. In such a reaction:


a.Copper is also oxidized even though no oxygen is present.

b.Chlorine is oxidized.

c.Oxidation occurs, but reduction does not.

d.There is no change in oxidation numbers.

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Greenleafable

The reaction 2 Cu + O2 → 2 CuO has long been called an oxidation-reaction. Copper also reacts with chlorine:

Cu + Cl2 → CuCl2. In such a reaction:
A. Copper is also oxidized even though no oxygen is present.
This is because if it gains electrons, it is reduced - however, you can see that it lost an electron, while chlorine gained one, which means that this is oxidization. 

Answer:

A. Copper is also oxidized even though no oxygen is present.

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