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Question
What is the oxidation numbers of the underlined elements in the following and how do you rationalise your results?
Fe3O4
Numerical
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Solution
On taking the O.N. of O as - 2, the O.N. of Fe is found to be `+2 2/3`. However, O.N. cannot be fractional.
Here, one of the three Fe atoms exhibits the O.N. of +2 and the other two Fe atoms exhibit the O.N. of +3
| +2 | +3 |
| FeO, | Fe2O3 |
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