Impure copper has to be purified using electrolysis. Which of the following is correct?

Impure rod should be connected to positive terminal of the battery

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Impure rod should be made to react with I₂

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A heater should be moved on impure rod

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Impure rod should be connected to negative terminal of the battery

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Solution

The correct option is A
Impure rod should be connected to positive terminal of the battery

When an impure metal rod is to be purified using electrolysis, impure metal rod is made anode and should be connected to positive terminal of the battery.

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