MHT CET202521 Apr 2025Evening ShiftChemistryElectrochemistryActual
Which of the following relations about E ^ cell is false?
Options
- AE _ cell ^ = E _ ( cathode ) ^ - E _ ( anode ) ^
- BE _ cell ^ = 0.0592 n ₁₀ ~K
- CE _ cell ^ = G ^ nF
- DE _ cell ^ = E _ (anode) ^ + E _ (cathode) ^
Correct answer
C. E _ cell ^ = G ^ nF
Step-by-step solution
Determining the false electrochemical relation: The standard formula for cell potential is E_ cell ^ = E_ cathode ^ - E_ anode ^ where E_ cathode ^ and E_ anode ^ represent standard reduction potentials, so option A is correct. At 298 K, the relation E_ cell ^ = 0.0592 n ₁₀ K derives from the Nernst equation at equilibrium and thermodynamic principles, making option B valid. The thermodynamic relation between Gibbs free energy and cell potential is G^ = -nFE_ cell ^ . Rearranged, E_ cell ^ = - G^ nF . Option C omit