Question

Why does aluminium not rust at the same rate as iron?

• A. Nitrogen in the air reduces the reactivity of aluminium.
• B. Aluminium oxide layer formed due to rusting protects it.
• C. Aluminium is less reactive than iron.
• D. Aluminium does not rust.

Answer 1

The correct option is B

Aluminium oxide layer formed due to rusting protects it.

When aluminium is exposed to air, it reacts and a thin layer of aluminium oxide is formed. This layer protects the aluminium from further rusting.