Zinc oxide reacts with both $C a {(O H)}_{2}$ and $H_{2} S O_{4}$ , thus it is an example of a/an ________.

metallic dioxide

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metal hydroxide

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rust

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amphoteric oxide

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Solution

The correct option is D
amphoteric oxide

Amphoteric oxides are metal oxides that react with both acids and bases.
Since, zinc oxide reacts with both $H_{2} S O_{4}$ (an acid) and $C a {(O H)}_{2}$ (a base), it is an amphoteric oxide.
With acid:
$Z n O + H_{2} S O_{4} \to Z n S O_{4} + H_{2} O$
With base: $Z n O + C a (O H)_{2} \to Z n C a O_{2} + H_{2} O$

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