16. Do gases dissolve in water?
The gases are classified into two categories on the basis of solubility in water.
(a). Soluble gases: Soluble gases are those gases that completely dissolve in water.
Example: Oxygen, Carbon dioxide. Oxygen is dissolved in water which is essential for aquatic life.
(b). Insoluble gases: Insoluble gases are those gases that do not dissolve completely in water.
Example: Methane, Nitrogen etc.