12th Class Chemistry Sample Paper Chemistry Sample Test Paper-8

  • question_answer
      (a) What is fuel cell? Write the electrode reaction of a fuel cell which uses the reaction of hydrogen with oxygen.                                                                                                                                                                                                                                                                         (b) Write the cell formulation and calculate the standard cell potential of the galvanic cell in which the following reaction takes place:                                                                                                                                           

    Answer:

      (a) Fuel cell: Electrical cells which are designated to convert the energy from combustion of fuels such as  or directly into electrical energy are called fuel cell. In this cell, the hydrogen and oxygen are bubbled through a porous carbon electrode into concentrated aqueous.                                                                                                                                                                                               1     fuel cell electrode reactions are:                                           At Anode:                                                 At Cathode:                                                 Overall reaction:                                                                                                                                                   (b)                                                                                                                                                                                                                                                                                                   =                                        = 0.03 V                                                                                                                                                                                                                               =                                       =                                                                                                     


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