Concept:Rust is a form of iron(III) oxide, and metallic oxides are typically classified as basic oxides.
Explanation:Rusting takes place when iron reacts with oxygen and moisture in the atmosphere.
The reddish-brown product formed is hydrated iron(III) oxide,
Fe2O3⋅xH2O.
Iron(III) oxide is a metallic oxide.
Metallic oxides are generally basic oxides because they react with acids to produce salt and water.
For example:
Fe2O3+6HCl→2FeCl3+3H2OThis shows that rusting does not involve the formation of an acidic oxide, a reducing oxide, or an amphoteric oxide.
Therefore, the process of rusting is best described as the formation of a basic oxide.
The correct answer is option A.
Answer:A. Basic oxide