Write the electrode reactions in Nelson's cell.

Describe the composition of anode and cathode in a mercury cell. Write the electrode reaction for this cell.

What are fuel cells ? Write the electrode reactions of a fuel cell which uses the reaction of hydrogen with oxygen.

Write the electrode reaction and the net cell reaction for the following cells, which electrode would be the positive terminal in each cell? (a) Zn|Zn^(2+)||Br^(-),Br_(2)|Pt (b). Cr|Cr^(3+)||I^(-),I_(2)|Pt . (c). Pt|H_(2),H^(+)||Cu^(2+)|Cu (d). Cd|Cd^(2+)||Cl^(-),AgCl|Ag

Summarize the electrode reactions.

In the galvanic cell Cu|Cu^(2+)||Ag^(+)|Ag , the electrons flow from Cu - electrode at Ag - electrode. Answer the following questions regarding this cell: (a). Which is the anode? (b). Which is the cathode? (c). What happends at anode-reduction or oxidation? (d). What happens at cathode-oxidation or reduction? (e). Which electrode loses mass? (f). Which electrode gais mass? (g). white the electrode reaction. (h). Write the cell reaction. (i). Which metal has greater tendency to loss electron-Cu or Ag? (J) Which is the more reactive metal Cu or Ag? (k). What is the function of salt bridge represented by the symbol||?

Write electrode reactions taking place in Ni-Cd cell. Is it primary or secondary cell?

Give balanced equations for the electrode reactions involved in the following conversions at the respective electrodes :

DeltaG is the available energy (energy produced) during the electochemical reaction in galvanic cell which can be converted into useful work. In the light of second law of thermodynamics, in the cell, the change in electrode potential with temperature will be equal to:

(a) What are fuel cells ? Explain the electrode reactions involved in the working of H_(2)-O_(2) fuel cell. (b) Represent the galvanic cell in which the reaction Zn(s) + Cu^(2)(aq) to Zn^(2+) (aq) + Cu(s) takes place.

State the electrode reaction at the respective electrodes during extraction of Al from Al_(2)O_(3)