Consider the following statements pertaining to fuel cells:
1) Hydrogen oxygen fuel cell make use of concentrated KOH solution as electrolyte and porous graphite impregnated with platinum as electrodes
2) The efficiency of fuel cell is less than unity due to polarisation at electrodes and the resistance offered by the electrode and the electrolyte
3) The electrical work, assuming the cell to be working reversibly may be represented as
Which of the above statements are correct ?