Metallic oxides are basic oxides.

The general reaction follows: $\text{Metallic Oxide} + \text{Acid} \rightarrow \text{Salt} + \text{Water}$.

Copper(II) oxide is a black solid that dissolves in hydrochloric acid to form a blue-green solution due to the presence of $Cu^{2+}$ ions.

Useful for cleaning metal surfaces (descaling) where oxide layers are removed by acid etching.

Removal of copper oxide scale from electrical components.

Laboratory preparation of copper chloride.

Option A is incorrect because it is not balanced and represents an incorrect product ($CuOH$ is not a salt).

Option B is incorrect because it incorrectly suggests the release of oxygen gas ($O_2$), which is not a characteristic product of this neutralization.

Option D is incorrect because it is not balanced and suggests the formation of hydrogen gas ($H_2$), which typically occurs during the reaction of a metal with an acid, not a metallic oxide.