State how polarization is reduced in wet leclanche cell?

Polarization in a wet Leclanche cell is reduced by using a depolarizer such as manganese dioxide (MnO2) in the positive electrode. This depolarizer helps to prevent the buildup of hydrogen gas bubbles on the electrode surface, which can interfere with the flow of current and reduce the cell's efficiency. Additionally, the presence of a liquid electrolyte in the cell helps to facilitate the movement of ions and electrons, further reducing polarization.

Polarization in a wet Leclanché cell is reduced by:

- Using a porous diaphragm: A porous diaphragm, such as a cardboard or paper separator, is placed between the anode and cathode to prevent direct contact between the electrodes. This reduces the buildup of hydrogen gas bubbles around the cathode, which can block the flow of current.
- Depolarizing solution: The cathode is surrounded by a depolarizing solution, such as manganese dioxide (MnO2), which helps to remove hydrogen gas from the cathode surface. The MnO2 reacts with the hydrogen gas to form water, thereby reducing polarization.
- Zinc anode: Zinc is used as the anode in the cell. Zinc has a high hydrogen overpotential, which means that it is less likely to form hydrogen gas at its surface. This further reduces polarization.