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.

Question

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.

btaylor · Answer

if it gains electrons, it is reduced. if it loses electrons, it is oxidized. chloring gains electrons, and copper loses electrons. (A)