Is Cl2 + 2e- -> 2Cl- an oxidation half-reaction?

Answer 1

Oxidation is the loss of electrons. Did it lose electrons? Looks like it gained electrons to me.

Answer 2

Almost. It will be written as 2Cl- -> Cl2 + 2e-

Answer 3

I think it is an oxidation reaction because it gained electrons (the ones on the product side). It went from -1 to 0 (which is an increase in nox).