Question

Aluminium is much more reactive than iron because its standard reduction potential is higher than iron. Still, aluminium is less easily corroded than iron because :

• A. aluminium reacts with atmospheric carbon dioxide to form a self-protective layer of $A{l}_2{O}_3$.
• B. it has a higher reducing power and forms a self protective layer of $A{l}_2{O}_3$.
• C. it has a higher reducing power and does not react with oxygen so easily.
• D. both A and B.

Answer 1

The correct option is B it has a higher reducing power and forms a self protective layer of $A{l}_2{O}_3$.

Aluminium is much more reactive than iron because its standard reduction potential is higher than iron. However, aluminium is still less easily corroded than iron because oxygen forms a protective oxide layer of $A{l}_2{O}_3$ on its surface.