In the dry cell or Leclanche cell, a car...

In the dry cell or Leclanche cell, a carbon rod serves as the cathode, which is immersed in the electrolyte in the center of the cell. At cathode, manganese is reduced from the `"_"` oxidation state to the `"_"` state.

In the dry cell or Leclanche cell, a carbon rod serves as the cathode, which is immersed in the electrolyte in the center of the cell. At cathode, manganese is reduced from the `"_______"` oxidation state to the `"_______"` state.