Question

Aluminium does not oxidise readily in air because:

• A. it is high in the electrochemical series
• B. it is low in the electrochemical series
• C. the metal does not combine with oxygen
• D. the metal is covered with a layer of oxide which does not rub off

Answer 1

The correct option is D the metal is covered with a layer of oxide which does not rub off

Aluminium does not readily oxidize in air because it forms passive layer ($A{l}_2{O}_3)$ which is very stable which does not rub off.