Which of the following oxide(s)

Question:

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

(a) FeO

(b) Fe2O3

(c) Fe3O4

(d) Fe2O3 and Fe3O4

Solution:

(c).

3Fe (s) + 4H2O (g) ———> Fe3O4 (s) + 4H2 (g)

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