Question

Which is an amphoteric oxide.

• A. ZnO
• B. CaO
• C. BaO
• D. SrO

Answer 1

Answer: (A)

ZnO

Answer 2

ZnO is an amphoteric oxide,

$ZnO + H_{2}SO_{4} \rightarrow ZnSO_{4} + H_{2}O$

$ZnO + 2NaOH \rightarrow Na_{2}ZnO_{2} + H_{2}O$