Question

Fan and medal!!!!
The reaction 2Cu + O2 -->2CuO has long been called an oxidation-reaction. Copper also reacts with chlorine Cu + Cl2--> CuCl2. In such a reaction:
Copper is also oxidized even though no oxygen is present.
Chlorine is oxidized.
Oxidation occurs, but reduction does not.
There is no change in oxidation numbers.

Answer 1

So your question is...?

Answer 2

In that reaction, which happens? a,b,c, or d @hoslos

Answer 3

Is a, which says 'Copper is also oxidised even though oxygen is not present'.
Recalling what I told you about OIL-RIG
Let us take elemnt by element from reactants side to products side.
NB: let oxidation number be nox and take not that an element in its standard state has a nox of 0.
Cu Changed from 0 to 2+, meaning, it undergo OIL, since it lost electrons, becoming positively charged.
Cl changed from 0 to 1-, meaning, it undergo RIG, because it got negatively charged by gaining an electron.

Answer 4

thank you thank you @hoslos

Answer 5

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

Answer 6

Good. You got it.

Answer 7

No problem @madison.bush