InterviewSolution
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InterviewSolution
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Which of the following will act as cathode when connected to standard hydrogen electrode which has `E^(@)` value given as zero ? (i) `Zn^(2+)//Zn, E^(@)=-0.76V` (ii) `Cu^(2+)//Cu, E^(@)=+0.34 V` (iii) `Al^(3+)//Al, E^(@)=-1.66 V` (iv) `Hg^(2+)//Hg, E^(@)=+0.885 V`A. (i) and (ii)B. (ii) and (iv)C. (i) and (iii)D. (i), (ii), (iii) and (iv) |
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Answer» Correct Answer - B When the value of standard reduction potential is positive, the electrode undergoes reduction and acts as cathode. |
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