question_answer

  Give reasons: (a) Aluminum metal cannot be produced by the electrolysis of aqueous solution of aluminum salt.                                                                                                                                                                                                                                                                                                1 (b) Rusting of iron is quicker in saline water than ordinary water.                                                                               1

Answer:

                  (a) The oxidation potential of (1.660 V) is higher than that of hydrogen (0.83 V). That is why aluminum metal                 cannot be produced by the electrolysis of aqueous solution of aluminum salt.                                                    1       (b) In saline water, electrolytes live  are present which make faster the rusting of iron as compared to ordinary water.                                                                                                                                                                 1