Question

Which of the following oxide(s) of iron would be obtained on prolonged reaction of iron with steam?

Options

• FeO

• Fe₂O₃

• Fe₃O₄

• Fe₂O₃ and Fe₃O₄

Answer 1

Fe₃O₄

Explanation - 

Iron does not react with cold or hot water, but steam is passed over a red hot iron, it reacts to form iron (II, III) oxide and hydrogen gas.

`3"Fe"("s") + 4"H"_2"O"("g") overset(1023 - 1073  "K")(->) "Fe"_3"O"_4("s") + 4"H"_2("g")`