1. The chemical compounds which conduct electricity and as a result decompose by the loss and gain of electrons are called electrolytes. The chemical compounds which do not conduct electricity are called non - electrolytes.

  2. Electrolytic cells are the cells, use external voltage to push a reaction non - spontaneously and are used to convert electrical energy into chemical energy while electrolysis may be defined as a process in which movements of the ions take place towards their respective electrodes to undergo chemical changes under the influence of applied electric field. In the electrolysis of molten sodium chloride, sodium metal is formed at cathode, while chlorine gas is liberated at anode.

  3. Electrochemical voltaic cell uses spontaneous chemical reactions to generate an electric current through oxidation - reduction,-' reactions. The half reactions take place in half cells. The half cell in which reduction occurs is called cathode; the half cell in which oxidation occurs is called anode. Electrons flow in the external circuit from anode to cathode. Voltaic cells are used commercially as portable energy sources (batteries). Electrolysis is an important process used for the extraction of certain metals, in purification of metals and in electroplating. Nickel - plating and chromium plating are very important techniques to protect baser metals from corrosions.

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