Question

At 298 K, the standard reduction potentials for the following half-reactions are given. Which acts as an anode with others in an electrochemical cell?

-0.762 V

-0.740 V

0.000 V

+0.762 V

A

B

C

D

Medium
Solution
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Correct option is A)



 To act as anode 

SRP cathode > SRP of the anode (for all cases)
The one with lowest SRP can act as an anode for all

  acts as an anode.

Hence, option is correct.

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