Question

Which one of the following is an amphoteric oxide?

• A. $ZnO$
• B. $Na _{2} O$
• C. $SO _{2}$
• D. $B _{2} O _{3}$

Answer 1

Answer: (A)

$ZnO$

Answer 2

$ZnO$ can react with acid and base both $ZnO +2 HCl \to ZnCl _{2}+ H _{2} O$ $ZnO +2 NaOH \to Na _{2} ZnO _{2}+ H _{2} O$