Read the passage given below and answer the following questions: (3) A potential difference which develops between the electrode and the electrolyte is called electrode potential. When the concentrations of all the species involved in a half-cell is unity then the electrode potential is known as standard electrode potential. Standard electrode potentials are used for various applications. In a galvanic cell, the half-cell in whichoxidation takes place is called anode and it has a negative potential with respect to the solution. The other half-cell in which reduction takes place is called cathode and it has a positive potential with respect to the solution. The cell potential is the difference between the electrode potentials (reduction potentials) of the cathode and anode. (a) What can be inferred from the negative electrode potential of the oxidation half-cell Zn to Zn2+ ? (b) Write the cell representation of the reaction given below: Cu(s) + 2Ag+ (aq) ? Cu2+ (aq) + 2Ag(s) (c) Calculate the emf for the following reaction: Mn3+ + Fe2+ ? Mn2+ + Fe3+ Given, Mn3+ + e? ? Mn2+ ; E 0 = 1.5 V and Fe3++ e? ? Fe2+ ; E 0 = 0.77 V