Question

Zinc oxide reacts with $Ca{\left(OH\right)}_2$ and $H_{2}S{O}_4$, thus it is a/an ________.

• A. Metallic oxide
• B. Metal hydroxide
• C. Rust
• D. Amphoteric oxide

Answer 1

The correct option is D

Amphoteric oxide

Zinc oxide reacts with acids and bases, it is an amphoteric oxide.
$Ca(OH{)}_2\text{is a base and}{H}_{2}S{O}_4\text{is an acid}.ZnO(s)+H_{2}S{O}_4(aq)\to ZnS{O}_4(aq)+H_{2}O(l\left)ZnO\right(s)+2Co(OH{)}_2\left(aq\right)\to CaZn{O}_2\left(aq\right)+H_{2}O\left(l\right)$