Question

Identify the amphoteric oxide.

• A. Aluminium oxide
• B. Iron oxide
• C. Copper oxide
• D. Magnesium oxide

Answer 1

The correct option is A Aluminium oxide

Oxides that show acidic, as well as basic behaviour, are called amphoteric oxide. Aluminium oxide is an amphoteric oxide because it acts as acid as well as base and forms salt and water.

$A{l}_2{O}_3+6HCl\to 2AlC{l}_3+3H_{2}O$ (Basic nature)

$A{l}_2{O}_3+2NaOH\to 2NaAl{O}_2+2H_{2}O$ (Acidic nature)

Oxides of iron, copper, and magnesium are not amphoteric. So the correct option is A