Question

What will be the products formed when iron reacts with water vapour?

Answer 1

Iron is a metal but does not react vigorously, upon the treatment of iron metal with water vapour leads to the chemical reaction. The products of the chemical reaction occurring between the iron metal and water vapour is iron (III) oxide and hydrogen gas.

Complete answer:
The periodic table is the representation of chemical elements arranged in the increasing order of atomic numbers and arranged in the vertical columns and horizontal rows. The vertical columns are called groups and the horizontal rows are called periods. There are seven periods and eighteen groups in the periodic table.
The elements are also divided into four blocks namely s, p, d and f blocks. The d-block is the representation of elements that are arranged in the middle of the periodic table.
Ferrous or iron is the element with atomic number $26$ and has the eight electrons in its outermost shell. It is a metal and reacts with water vapour.
The chemical reaction involved between the iron metal and water vapour is as follows:
$3Fe + 4{H_2}O \to F{e_3}{O_4} + 4{H_2}$
Thus, iron metal reacting with water vapour present in the atmosphere leads to the formation of iron(III) oxide and also the liberation of hydrogen gas takes place. It is the chemical reaction that takes place in a very long time i.e.., days.

Note :
The formation of iron(III) oxide from ferrous and water vapour is called rusting of iron. It is the chemical reaction generally we see when the iron rods are left outside for a few days. The brown colour layer forms on the iron which is nothing but iron(III) oxide.