Question

Applying a coat of paint over an iron gate prevents it from rusting.

• A. True
• B. False

Answer 1

The correct option is A True

Rusting:

1. When Iron is exposed to moisture or Oxygen, its oxidation occurs and it is called as Rusting of iron.
2. Rusting of Iron is a Chemical change because a new substance Iron oxide (${\mathrm{Fe}}_2{\mathrm{O}}_3$) is formed.
3. During this chemical reaction, Iron ($\mathrm{Fe}$) is converted into Iron oxide (${\mathrm{Fe}}_2{\mathrm{O}}_3$). $$\begin{gathered} 4\mathrm{Fe}\left(\mathrm{s}\right)+3{\mathrm{O}}_2\left(\mathrm{g}\right)+2.{\mathrm{xH}}_2\mathrm{O}\to 2{\mathrm{Fe}}_2{\mathrm{O}}_3.{\mathrm{xH}}_2\mathrm{O} \\ \left(\mathrm{Iron}\right)\left(\mathrm{Oxygen}\right)\left(\mathrm{Water}\right)(\mathrm{Hydrated}\mathrm{ferric}\mathrm{oxide}/\mathrm{Rust}) \end{gathered}$$
4. The essential component required for rusting is the presence of air(Oxygen) and moisture(water).
5. When iron gate gets painted, it prevents the iron from getting in contact with Oxygen and moisture.
6. Hence, prevents iron from rusting.

Therefore, the given statement - Applying a coat of paint over an iron gate prevents it from rusting is true.