Q. What is the name of defect occurred in a cell, due to the presence of impurities on the zinc plate?
Solution:
Local Action. This is the tendency for the chemically active components of a cell to react with each other, and so become exhausted even when no current is being drawn from the cell.The zinc becomes coated with hydrogen bubbles, as a result of its reacting with the acid, even when no current is being drawn. After a while either the zinc will be entirely consumed, or the acid will be neutralised, all to no useful effect.
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