MHT CET Medical202624 April 2026Evening ShiftChemistryElectrochemistryActual
What is the Standard cell potential of a cell constituted by two electrodes, A (E^0_ A ^+/ A = 0.30 V ) and B (E^0_ B ^+/ B = +0.42 V ) ?
Options
- A0.12 V
- B0.30 V
- C0.42 V
- D0.72 V
Correct answer
A. 0.12 V
Step-by-step solution
The standard reduction potential of electrode B is higher than that of electrode A. Thus, electrode B acts as the cathode and electrode A acts as the anode. The standard cell potential is given by: E^0_ cell = E^0_ cathode - E^0_ anode Substituting the given values: E^0_ cell = 0.42 V - 0.30 V = 0.12 V Answer: 0.12 V