Question

The oxide(s) of iron that would be obtained on its prolonged reaction with steam is

• A. $\text{FeO}$
• B. ${\text{Fe}}_2{\text{O}}_3$
• C. ${\text{Fe}}_3{\text{O}}_4$
• D. ${\text{Fe}}_2{\text{O}}_3$ and ${\text{Fe}}_3{\text{O}}_4$

Answer 1

The correct option is C

${\text{Fe}}_3{\text{O}}_4$

Metals react with water to form metal hydroxide and hydrogen gas. Iron does not react with cold or hot water. It reacts with steam to give ${\text{Fe}}_3{\text{O}}_4$ and ${\text{H}}_2$ gas. The reaction takes place as follows:
$3\text{Fe(s)}+4{\text{H}}_2\text{O(g)}\to {\text{Fe}}_3{\text{O}}_4\text{(s)}+4{\text{H}}_2\text{(g)}$