Question & Answer » Chemistry Questions » Chemically Rust is: (1) Hydrated ferrous oxide (2) Hydrated ferric oxide (3) Only ferric oxide (4) None of these
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Chemically Rust is: (1) Hydrated ferrous oxide (2) Hydrated ferric oxide (3) Only ferric oxide (4) None of these

Table of Content

Answer: (2) Hydrated Ferric Oxide

Explanation:

  • Iron reacts with oxygen, when exposed to moisture, it forms a chemical substance that is brown in colour and is referred to as rust. 
  • Rusting is a corrosive process that results in the development of red or orange covering on the outer layer of metals. Rusting mainly happens on surfaces of iron and its alloys.
  • Corrosion results in the breakdown of materials due to chemical, electrochemical or some other type of reactions.
  • Chemical formula for rust is Fe2O3.xH2O. So rust is hydrated iron (III) oxide.