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How can an electrochemical cell be converted into an electrolytic cell ?

1. Applying an external opposite potential greater than 0 cell E
2. Reversing the flow of ions in salt bridge.
3. Applying an external opposite potential lower than 0 cell E
4. Exchanging the electrodes at anode and cathode.

Correct answer: Applying an external opposite potential greater than 0 cell E

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