When steam is passed over red hot iron, the substances formed are : (a) \( \mathrm{Fe}_{2} \math...

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When steam is passed over red hot iron, the substances formed are :
(a) \( \mathrm{Fe}_{2} \mathrm{O}_{3}+\mathrm{H}_{2} \)
(b) \( \mathrm{H}_{2}+\mathrm{FeO} \)
\( \mathrm{P} \)
(c) \( \mathrm{Fe}_{3} \mathrm{O}_{4}+\mathrm{H}_{2} \)
(d) \( \mathrm{Fe}_{3} \mathrm{O}_{4}+\mathrm{H}_{2} \mathrm{O} \)
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