Question

A brown layer formed when an iron article is left exposed in air in an open area is called

Answer 1

Explanation:

A brown layer formed when an iron article is left exposed in air in an open area is called as RUSTING OF IRON.

Answer 2

A brown layer formed when an iron article is left exposed in the air in an open area is called Rust.

• Iron can react with moisture and oxygen to form rust.
• The formation of rust is an electrochemical reaction.
• The reaction of rusting is shown as follows:

4Fe + 3O2 + 6H2O → Fe2O3 + 2Fe(OH)3.

• Rust is chemically known as iron oxide (Fe2O3)
• Slow oxidation of iron in the presence of moisture or water is called rusting. Rusting is an irreversible change that destroys the metal.
• The rusting process can be fastened by salty water, so the ships tend to get rusted quickly.