Q.

In electrorefining of metal, the impure metal is made the anode and a strip of pure metal, the cathode during electrolysis of an aqueous solution of a complex metal. This method of refining is useful in case of refining of
I. Al 
II. Na 
III. Ag 
IV. Cu
   Choose the correct option.

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a

I, Il, III and IV

b

I, III and IV

c

I, II and III

d

II, lII and IV

answer is C.

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Detailed Solution

The electrorefining method of metals is useful for Al, Ag and Cu.

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