Q
Which of the following is an amphoteric oxide?
ALP CBT-1, 9-Aug-18 S-3
2018
✓ Answer:
A
Aluminium oxide
Amphoteric oxides are oxides that can react with both acids and bases. For example, Aluminium oxide (Al2O3). Aluminium oxide reacts with acids like hydrochloric acid (HCl) and bases like sodium hydroxide (NaOH), to form salt and water. Al2O3 + 6HCl → 2AlCl3 + 3H2O (Salt); Al2O3 + 2NaOH → 2NaAlO2 + H2O (Salt).