Given,

(i) Cu2⁺ + 2e^- Cu;            E^o =0.337 V

(ii)Cu2⁺ + e^- Cu⁺;             E^o =0.153 V

cu⁺ = e^-  Cu, will be.

The efficiency of a fuel cell is given by.

Cu⁺(aq) is unstable in solution and undergoes simultaneous oxidation and reduction according to the reaction.

              2Cu⁺ (aq) Cu²⁺ (aq) +Cu (s)

A 5 A current is passed through a solution of zinc sulphate for 40 min. The amount of zinc deposited at the cathode is. 

Standard electrode potentials are

The specific conductance of 0.1 NKCI solution at 23^oC is 0.012 ohm^-1 cm^-1. The resistance of cell containing the solution at the same temperature was found to be 55 ohm. The cell constant will be.

The standard emf of a galvanic cell involving cell reaction with n = 2 is found to be 0.295 V at 25^o C. The equilibrium constant of the reaction would be.

(Given F = 96500 C mol^-1; R =8.314 JK^-1 mol^-1)

Without losing its concentration ZnCI₂ solution cannot be kept in contact with.

On the basis of the information available from the reaction.

 of  O_², the minimum emf required to carry out the electrolysis of AI₂O₃ is 

AI_2O3 is reduced by electrolysis at low potentials and high currents. If 4.0 x 10⁴ A of current is passed through moleten AI₂O₃ for 6 h, what mass of aluminium is produced ? (Assume 100% current efficiency, at mass ofAI = 27 g mol^-1)