68th B.P.S.C. (Pre) 2023
Some metal oxides react with acid as well as base to produce salt and water. They are known as amphoteric oxides. The examples of amphoteric oxides are
aCuO and ZnO
bAl₂O₃ and ZnO✓ Correct
cAl₂O₃ and CuO
dMore than one of the above
eNone of the above
Explanation
The correct answer is option (b) Al₂O₃ and ZnO. Some metal oxides react with both acids and bases to form salt and water; these are known as amphoteric oxides. Some oxides can act as both acidic and basic (amphoteric). CuO is basic in nature; hence, it is not amphoteric.
general-science