Multiple choice

Iron articles rust because of the formation of

  1. ferrous chloride

  2. a mixture of ferrous and ferric hydroxides

  3. ferric sulphate

  4. ferric chloride

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Rust is a hydrated iron oxide, typically represented as a mixture of hydrated ferrous and ferric hydroxides or oxides formed in the presence of oxygen and moisture.