Question

Which one of the following metals is protected from corrosion by a layer of its own oxide?

• A. Aluminium
• B. Copper
• C. Silver
• D. Gold

Hint:

Metals like aluminium are protected by a thin oxide layer, which prevents corrosion.

Answer 1

The Correct Option is A

- Aluminium's surface develops a thin oxide layer (\(Al_2O_3\)) that shields it from additional corrosion.
- This oxide layer's stability hinders the metal's reaction with air and water.
Therefore, the correct choice is (A) Aluminium.