Step 1: Understanding the Concept:
Solutions are classified based on the physical state of the solute and the solvent.
Carbonated water (such as soda water) consists of Carbon Dioxide ($CO_2$) dissolved in water ($H_2O$) under pressure.
Step 2: Detailed Explanation:
In carbonated water:
The solute is Carbon Dioxide ($CO_2$), which is a gas.
The solvent is water ($H_2O$), which is a liquid.
Since a gas is dissolved in a liquid, it is a "gas in liquid" type of solution.
Step 3: Final Answer:
Carbonated water is an example of a gas in liquid solution.