In electro-refining of metal the impure metal is made the anode and a strip of pure metal, the cathode, during the electrolysis of an aqueous solution of a complex metal salt. This method can not be used for refining of
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a
Silver
b
Copper
c
Aliminium
d
Sodium
answer is D.
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Detailed Solution
Na reacts vigorously with water (exothermic process). The product is NaOH and Hydrogen gas.
In electro-refining of metal the impure metal is made the anode and a strip of pure metal, the cathode, during the electrolysis of an aqueous solution of a complex metal salt. This method can not be used for refining of