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Option 2 : Refining
Refining: It is a process by which the purity of the metal extracted from their ores can be improved
Electrodeposition: It is the process by which one metal is deposited over other metal or non-metal by electrolysis
Electro metallization: It is the process by which the metal can be deposited on a conduction base for decoration and for protective purposes. Any non-conductive base is made as conductive by depositing graphite layer over it
Anodizing: The process of deposition of oxide film on a metal surface is known as anodizing and oxidation
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