Question

State three uses of the phenomenon of electrolysis

Answer 1

1. Extraction of metals from there ores.
2. Electro refining of metal.
3. Electroplating.

Answer 2

Uses of electrolysis:
1. Electrolysis is used in the extraction of metals from their ores. For example, when a current is passed through molten sodium chloride, sodium is deposited at the cathode and chlorine gas is evolved at the anode. Aluminium and potassium are also extracted by electrolysis.
2. It is used for refining certain metals such as copper and zinc.
3. Electrolysis is used for the manufacture of chlorine. In submarines, oxygen produced by the electrolysis of water is used for breathing.
4. Electrolysis is used for electroplating many things we use every day like 5 rupees coin.


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