Answer:
The correct answer is the option A which is: Cl2 + 2e- → 2Cl-
Step-by-step explanation:
Reduction is the gain of electrons and resulting in neutral or negative ions.
It is also the gain of hydrogen and release of oxygen ions.
- According to first most definition, option A describes the reduction.
- Option B is incomplete reaction.
- While C and D are oxidation reactions.