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A solution is a homogeneous mixture that can be a liquid,solid, or gas depending on the solvent's state. It also has a solute that makes it up also. The various types of solutions are gas in gas, gas in liquid, liquid in liquid, solid in liquid, liquid in solid and solid in solid.
Solid in solid: metal alloys. Liquid in liquid: vinegar dissolving in water. Gas in gas: air. Solid in liquid: salt dissolving in water. Liquid in solid: mercury absorbed by gold. Gas in liquid: carbon dioxide dissolving in soda. Solid in gas: smoke particles in air. Liquid in gas: water vapor in air. Gas in solid: hydrogen absorbed by palladium.
Examples of solid-gas solutions include smoke (solid particles in air), powdered activated carbon in air filters (carbon adsorbing gases), and various metal oxides in the atmosphere (like iron oxide in rust).
No, solutions can exist in different states of matter, not just in the liquid state. Solutions can exist in the solid, liquid, or gas state depending on the solvent and solute involved in the mixture.
What are two ways solids form from solutions ?