Q. Which oxide is amphoteric in nature?
A) $ZnO$
B) $CaO$
C) $Na_{2}O$
D) $BaO$
Explanation
(a)
Zinc oxide is an amphoteric oxide as it reacts with both acid and alkali.
$ZnO + 2HCl \rightarrow ZnCl_{2} + H_{2}O$
$ZnO + 2NaOH \rightarrow Na_{2}ZnO_{2} + H_{2}O$
sodium zincate
Rest all $\left( Na_{2}O,\ CaO\ and\ BaO \right)$ are basic oxides.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.