Question

Differentiate between primary and secondary cells.

Answer 1

Answer:

A primary cell is light and less expensive whereas a secondary cell is heavy and expensive. A primary cell cannot be recharged whereas a secondary cell can be recharged. In a primary cell chemical reaction is irreversible whereas in a secondary cell chemical reaction is reversible.

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Answer 2

Answer:

Primary cells are those in which the redox reaction occurs only once and the cell becomes dead after sometime and cannot be used again. Two common examples are dry cell and Mercury cell.

Secondary cells are those which can be recharged by passing an electric current through them and hence can be used over and again.Two examples are lead storage battery and nickel-cadmium battery.

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