How the reaction between acid and metallic oxide occurs? Write equation.

When acid reacts with metallic oxide, it produces salt and water.

Metallic oxide + acid → Salt + water

For example: When copper oxide (metal oxide) reacts with hydrochloric acid, it forms copper chloride (salt) and water. The reaction takes place is given below:

CuO + HCl → CuCl₂ + H₂O

Metal oxides produce salt and water on reaction with acids, hence these are basic in nature.