Question

A popular metal X reacts with oxygen gas to give an amphoteric oxide. Identify the metal X. Recall that amphoteric oxide show both acidic and basic behaviour.
$X+O_2\to \text{Amphoteric Oxide}$

• A. Na (Sodium)
• B. Al (Aluminium)
• C. C (Carbon)
• D. K (Potassium)

Answer 1

The correct option is B Al (Aluminium)

Aluminium on reaction with Oxygen, form $A{l}_2{O}_3$. This metal oxide shows both acidic as well as basic behaviour. Such metal oxides which react with both acids as well as bases to produce salts and water are known as amphoteric oxides.