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Properties and Uses of Calcium Oxide

Which one of ...

Question

Which one of the following oxides is soluble in water?

A

Zinc oxide

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B

Calcium oxide

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C

Ferric oxide

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D

Ferrous oxide

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Solution

The correct option is D Calcium oxide
Calcium Oxide dissolves in water and form Calcium hydroxide.
$C a O + H_{2} O \to C a (O H)_{2}$

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