Chemistry

Question Analysis
This question involves classifying solutions by the physical states of solute and solvent. The main focus is on identifying a solution where the solvent is liquid and the solute is gas.

Key Concept Explanation
Solutions are categorized by the states of their components: the solvent is the major component, and the solute is the minor component.
A liquid solution with a gaseous solute consists of a gas dissolved uniformly in a liquid solvent. No visible gas bubbles remain when the solution is stable.

Step-by-Step Solution
1. Identify the target solution type: liquid solvent + gaseous solute.
2. Analyze each option:
A: Brass is a solid solution (solid solvent + solid solute) → eliminate.
B: Soda water contains CO₂...