Chemistry - Electrochemistry Question with Solution | TestHub

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:
$2{\text{MnO}}_{2(s)}+2{\text{NH}}_4^{+}+2e^{-}\to {\text{Mn}}_2{\text{O}}_{3(s)}+2{\text{NH}}_{3(aq)}+{\text{H}}_2{\text{O}}_{(l)}$

Thus, the cell that exhibits this net reduction reaction is the Leclanche cell.

Answer: Leclanche cell