Easy
The chemical process by which iron develops a reddish-brown coating when exposed to moist air over time is called what?
Explanation
Explanation
Rusting is a slow oxidation process in which iron reacts with oxygen and moisture in the air to form hydrated iron(III) oxide (rust), which is a form of corrosion.
PRO TIP
Re-check your working by substituting the answer back into the original question.