Oxidation numbers of \( \mathrm{Fe} \) in \( \mathrm{Fe}_{3} \mathrm{O}_{4} \) are: (A) \( +2 \)...

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Oxidation numbers of \( \mathrm{Fe} \) in \( \mathrm{Fe}_{3} \mathrm{O}_{4} \) are:
(A) \( +2 \) and \( +3 \)
(B) \( +1 \) and \( +2 \)
(C) \( +1 \) and \( +3 \)
(D) none of these
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