Topic: defects of a primary cells, polarization and local

DEFECTS OF A PRIMARY CELLS, POLARIZATION AND LOCAL ACTION Polarization : this is the process whereby hydrogen gas bubbles are produced around the copper plate of the cell. When the zinc electrodes react with Tetraoxosulphate vi acid  the Hydrogen bubbles are produced. The effect of this is the production of back E.m.f which reduces the current in the external circuit . ...