State an application of electrolysis

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State an application of electrolysis

Posted by Shakti Swarup Pradhan 7 years, 10 months ago

CBSE > Class 08 > Science

1 answers

Yogita Ingle 7 years, 10 months ago

1. In the extraction of metals: The electrolysis of the molten chlorides or oxides of reactive metals like sodium, calcium, magnesium and aluminum, gives the metal. For example, sodium metal is obtained by the electrolysis of molten sodium chloride. Similarly, aluminium is obtained by the electrolysis of molten aluminium oxide (A12O3). In each case, metal is deposited at the cathode.
2. Refining of metals: Metals like zinc, copper and aluminium are refined by the electrolysis of aqueous solution of a salt of the metal concerned.
3. Electroplating: One of the important uses of electrolysis is in electroplating. The process of depositing a thin layer of a superior metal over the surface of an inferior metal with the help of electric current is known as electroplating.

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