Question

(iv) Two statements are given below regarding rusting of iron.
(I) The rusting of iron is a redox reaction and reaction occurs as, 4Fe +302 4Fe3+ +602
(II) The metallic iron is oxidised to Fe2+ and O2 is reduced to 02-. Select the correct statement(s).
(a) I only
(b) II only
(c) Both I and II
(d) None of these​

Answer 1

Answer:

(a) I only

This is the right answer.

Answer 2

The correct option is (d) None of these as both the statements represent wrong chemical equations.

• Rusting of iron is a redox reaction as oxidation reaction and reduction reaction take place simultaneously.

• Iron reacts with moist air in presence of water and a reddish deposit is formed which is called rust. The chemical equation of rust is Fe2O3.H2O

• The rusting of iron is a redox reaction and reaction occurs as 4Fe + 3O2 + 6H2O → 4Fe(OH)3.

• The metallic iron is oxidized to iron (II) ions. O2 + 2H2O + 4e- → 4OH-.

• And oxygen is reduced to hydroxide ions, 2Fe + O2 + 2H2O → 2Fe(OH)2.
• Thus, none of the statements are correct regarding rusting of iron.