In which of the following cells Ecell =Ecell ∘?

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Cu(s)Cu2+(0.01M)Ag+(0.1M)Ag(s)

PtH2|pH=1|Zn2+(0.01M)Zn(s)

PtH2|pH=1|Zn2+(1M)Zn(s)

PtH2H+=0.01MZn2+(0.01M)Zn(s)

answer is A.

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Detailed Solution

From Nernst equation,Ecell =Ecell ∘−0.0591nFlog⁡Q.If Q=1,log⁡Q=0 so, Ecell =Ecell ∘This condition is found in (a) and (b).

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