Which of the following oxides is amphoteric?
- Carbon(II) oxide
- Nitrogen(IV) oxide
-
Lead(II) oxide
- Calcium oxide
The correct answer is: C
Explanation
Aluminium oxide is an amphoteric oxide. With sodium hydroxide solution, it produces water and sodium aluminate (NaAlO2). The other common examples of amphoteric oxides include SnO, ZnO, and PbO. Al2O3 is an amphoteric oxide.