Question

An oxide act as a base when it reacts with an acid and acts as an acid when it reacts with a base. Identify the type of oxide.

• A. Amphoteric oxides
• B. Acidic oxides
• C. Basic oxides
• D. Neutral oxides

Answer 1

The correct option is A

Amphoteric oxides

Amphoteric oxides are metallic oxides, which show both basic as well as acidic properties. When they react with an acid, they produce salt and water, showing basic properties. When they react with alkalis, they form salt and water showing acidic properties.

For example, $A{l}_2{O}_3$ is an amphoteric oxide. When it reacts with HCl, it acts as a base to form $AlC{l}_3$ and water. When it reacts with NaOH, it acts as an acid to form $NaAl{O}_2$ and water.