alleryOn prolonged reaction of iron with steam, the oxide formed is
AFe(OH)₃
BFe₂O₃
CFeO
DFe₃O₄
Answer & Solution
Correct answer: D. Fe₃O₄
$3Fe + 4H_2O \xrightarrow{steam} Fe_3O_4 + 4H_2$.
Magnetic iron oxide (Fe₃O₄) is produced, not the rust Fe₂O₃ (which needs moist air).
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