State the products of the reaction 'when steam is passed over red-hot iron'.

When steam is passed over red hot iron, magnetic oxide of iron and hydrogen are produced.

$3\text{Fe} + \underset{\text{steam}}{4\text{H}$2\text{O}} \rightleftharpoons \underset{\text{magnetic oxide of iron}}{\text{Fe}3\text{O}4} + \underset{\text{hydrogen}}{4\text{H}2}