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Q.
An electrochemical cell can behave like an electrolytic cell when________ .
Electrochemistry
Solution:
We can study the effect of opposing potential applied to a galvanic cell as follows.
1) When $E _{\text {external }}<1.1 V$
In a galvanic cell, if an external opposite potential is applied and increased slowly, we find that the reaction continues to take place till the opposing voltage reaches the value $1.1 V$.
2) When $E_{\text {extemal }}=1.1 V$
When the external voltage is $1.1 V$ the reaction stops altogether and no current flows through the cell.
3) When $E_{\text {external }}>1.1 V$
Any further increase in the external potential again starts the reaction but in the opposite direction. It now functions as an electrolytic cell, a device for using electrical energy to carry non-spontaneous chemical reactions.