Give one example for a basic oxide which is soluble in water.
The oxides which can act as a base are called basic oxides. They can react with water to give a basic solution or can be dissolved in strong acid. The metallic oxides are usually basic in nature.
Sodium oxide is a basic oxide formed from sodium and oxide ions that is soluble in water. It dissolves in water to form a Sodium hydroxide (NaOH) solution.