A) \[{{E}^{o}}=-ve\]
B) \[{{E}^{o}}=+ve\]
C) \[emf=+ve\]
D) \[(\Delta G+{{E}^{o}})=+ve\]
Correct Answer: C
Solution :
The standard free energy change of the reaction is related to the EMF of the cell as \[-\Delta {{G}^{o}}=nFE_{cell}^{\text{o}}\] For a spontaneous reaction, \[\Delta {{G}^{o}}\] must be negative, \[n\] and \[F\] cannot have negative values, thus a cell reaction is spontaneous if its EMF is positive.
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