STANDARD Chemistry Standard Electrode Potentials Multiple Correct Question
Which of the following will act as cathode when connected to standard hydrogen electrode which has E° value given as zero? (i) Zn²⁺/Zn, E° = −0.76 V (ii) Cu²⁺/Cu, E° = +0.34 V (iii) Al³⁺/Al, E° = −1.66 V (iv) Hg²⁺/Hg, E° = +0.885 V
(i) and (ii)
(ii) and (iv)
(i) and (iii)
(i), (ii), (iii) and (iv)
Correct Answer
Detailed Explanation
When the value of standard reduction potential is positive, the electrode undergoes reduction and acts as cathode.
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