Question:

A galvanic cell can behave like an electrolytic cell when

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In an electrolytic cell, external energy is used to drive a non-spontaneous reaction, whereas in a galvanic cell, energy is produced from a spontaneous reaction.
Updated On: Jun 25, 2025
  • E\textsubscript{cell} = E\textsubscript{ext}
  • E\textsubscript{ext}>E\textsubscript{cell}
  • E\textsubscript{cell}>E\textsubscript{ext}
  • E\textsubscript{cell} = 0
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The Correct Option is B

Solution and Explanation

A galvanic cell generates electricity spontaneously due to the potential difference between its electrodes. However, if an external voltage (E\textsubscript{ext}) is applied that exceeds the cell potential (E\textsubscript{cell}), the cell will act as an electrolytic cell. This forces the non-spontaneous reaction to occur, and the cell starts consuming electrical energy.
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