2 MnO _ 2(s) + 2 NH ₄^+ + 2e^- Mn ₂ O _ 3(s) + 2 NH _ 3(aq) + H ₂ O _ (l) Which of the following cell exhibits above net reduction reaction?

Step-by-step solution

The given reaction is the reduction half-reaction that takes place at the cathode in a Leclanche cell (also known as a dry cell). At the cathode, manganese dioxide is reduced in the presence of ammonium ions to form manganese(III) oxide (or MnO(OH)), ammonia, and water. The overall cathode reaction is: 2 MnO _ 2(s) + 2 NH ₄^+ + 2e^- Mn ₂ O _ 3(s) + 2 NH _ 3(aq) + H ₂ O _ (l) Thus, the cell that exhibits this net reduction reaction is the Leclanche cell. Answer: Leclanche cell