Write names of three methods used for refining of metals.
Page 171 Chapter - 8.Metals
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Three methods are:
1) Roasting- Sulphide ores are convertedvinto oxides by heating in presence of excess air.
2) Calcination-Carbonate ores are converted into oxides by heating in limited air.
3) Electrolytic Refining- Impure metal is made at anode and pure metal is made at the cathode where a solution of metal salt is used as an electrolyte.
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1) Roasting- Sulphide ores are convertedvinto oxides by heating in presence of excess air.
2) Calcination-Carbonate ores are converted into oxides by heating in limited air.
3) Electrolytic Refining- Impure metal is made at anode and pure metal is made at the cathode where a solution of metal salt is used as an electrolyte.
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Answer:
hey there.,,,
Explanation:
Roasting
Calcination
Electrolysis
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