Which metal is protected by a layer of its own oxide?

Question

Which metal is protected by a layer of its own oxide? (A) Al (B) Ag (C) Au (D) Fe

Tardigrade Admin · Accepted Answer

Aluminium in air is ordinarily protected by a molecule-thin layer of its own oxide. This aluminium oxide layer serves as a protective barrier to the underlying aluminium itself and preventing chemical reactions with the metal.

Q. Which metal is protected by a layer of its own oxide?

Al

Ag

Au

Fe

Aluminium in air is ordinarily protected by a molecule-thin layer of its own oxide. This aluminium oxide layer serves as a protective barrier to the underlying aluminium itself and preventing chemical reactions with the metal.