Question
What is meant by electrolysis? Mention its two uses with examples.
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Answer
When electric current is passed through an aqueous solution or molten ionic compound, the ions of the compound form products on electrodes by electrolytic oxidation-reduction. This process is called an electrolysis.
Uses: (1) Gas and metal can be obtained from an aqueous solution of salt.
For example, Electrolysis of an aqueous solution of NaCl produces Na metal and Cl2 gas.
(2) The coating (protective layer) of one metal can be formed on the surface of another metal.
For example, Gold plating can be carried out on the surface of silver articles.
Zn layer can be formed on the surface of iron.
Uses: (1) Gas and metal can be obtained from an aqueous solution of salt.
For example, Electrolysis of an aqueous solution of NaCl produces Na metal and Cl2 gas.
(2) The coating (protective layer) of one metal can be formed on the surface of another metal.
For example, Gold plating can be carried out on the surface of silver articles.
Zn layer can be formed on the surface of iron.
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