Question

The statement given below is incorrect. Write the correct statement.

Rusting of iron is an example of physical change.

Answer 1

Chemical change: It is a type of change in which there is a change in the substance's chemical properties and a new substance is formed.

• Rusting iron is an example of chemical change.

Physical change: It is a type of change in which there is no change in the substance's chemical properties and no new substance is formed.

• For example Melting of ice, freezing of water, etc.

Rusting of iron

• It means Iron($\mathrm{Fe}$) is getting a reaction with the air or Oxygen(${\mathrm{O}}_2$) present in the air.
• And the reaction will result in the production of Ferric oxide(${\mathrm{Fe}}_2{\mathrm{O}}_3$) which we commonly know as rust.
• $\underset{\mathrm{Iron}}{\mathrm{Fe}(\mathrm{s}})+\underset{\mathrm{Oxygen}}{{\mathrm{O}}_2\left(\mathrm{g}\right)}\to \underset{\mathrm{Ferric}\mathrm{Oxide}}{{\mathrm{Fe}}_2{\mathrm{O}}_3\left(\mathrm{s}\right)}$
• It is a type of chemical change as the product will have completely different properties than the reactant.
• It is a type of irreversible reaction.

Correct statement: Rusting iron is an example of chemical change.