Concept:Carbonated water is a homogeneous mixture in which a gas is dissolved in a liquid.
Explanation:Carbonated water is made by dissolving carbon dioxide gas
CO2​ in liquid water
H2​O.
So, the solute is a gas and the solvent is a liquid.
This type of solution is classified as gas-in-liquid.
When
CO2​ dissolves in water, it forms carbonic acid
H2​CO3​, which gives the drink its fizz and mild acidity.
The solubility of
CO2​ increases with pressure and decreases with temperature, which is why carbonated drinks are stored under pressure and served cold.
Therefore, among the given options, carbonated water matches "gas in liquid".
Answer:Option A: Gas in liquid.