11th Class Chemistry Redox Reactions Question Bank 11th CBSE Chemistry Redox Reactions

  • question_answer Articles of iron are generally coated with zinc. Explain.

    Answer:

                    Iron gets easily rusted in the presence of moist air. Formation of rust \[(F{{e}_{2}}{{O}_{3}}.x\,{{H}_{2}}O)\] is a redox reaction in which Fe is oxidised to  \[F{{e}^{3+}}\] ions. Since zinc is more reactive than iron (placed below iron in the activity series), it is oxidised to\[Z{{n}^{2+}}\] ions instead of iron when coated over the surface of iron. Thus, zinc takes part in the redox reaction while surface of iron remains intact.


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