Q. Which metal is protected by a layer of its own oxide?
A) Fe
B) Au
C) Ag
D) Al
Explanation
(d)
The thin protective layer of oxide,$\ Al_{2}O_{3}$ is formed which protects the metal form further attack if air and water and thus stable in air
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.