Impure metal rod is to be purified using electrolysis. Which of the following is correct?

Impure metal rod is made cathode and anode both

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Impure metal rod is made anode

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Impure metal rod is made cathode

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Molten impure metal serves as electrolyte

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Solution

The correct option is B
Impure metal rod is made anode

When an impure metal rod is to be purified using electrolysis, impure metal rod is made anode. The pure metal rod is made the cathode.

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Name two metals which are purified by using the chemical effect of current (or electrolysis).

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