Iron (Fe) is an important element which is found in the earth’s crust. It occurs in two oxidation state in the form of ferrous ( F e 2 + ) and ferric ( F e 3 + ) ions. Iron cycle comprise both oxidation and reduction reactions in nature. Biological oxidation of ferrous ions converts it into ferric oxidation state.

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Chapter 21.5, Problem 2MQ

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Iron (Fe) is an important element which is found in the earth’s crust. It occurs in two oxidation state in the form of ferrous (Fe2+) and ferric (Fe3+) ions. Iron cycle comprise both oxidation and reduction reactions in nature. Biological oxidation of ferrous ions converts it into ferric oxidation state.

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