In a battery, the following two oxidation-reduction reactions are taking place: rxn A: Zn + 2 OH- → ZnO + H₂O + 2e-
Rxn B: 2 MnO₂ + H₂O + 2e- → Mn₂O₃ + 2 OH-
What is undergoing reduction?

Question

Quizplus · Accepted Answer

Reduction involves the gain of electrons. In Rxn B, MnO₂ gains electrons (2e-) to form Mn₂O₃, indicating that MnO₂ is undergoing reduction.

In a Battery, the Following Two Oxidation-Reduction Reactions Are Taking