In chemistry, a solution is a homogeneous mixture composed of two or more substances. In such a mixture, a solute is dissolved in another substance, known as a solvent. Types of solutions Usually, the substance present in a greater amount is considered as the solvent. Solvents can be gases, liquids, or solids. The solution that forms has the same physical state as the solvent. Gas If the solvent is a gas, only gases can be dissolved. An example for a gaseous solution is air (oxygen and othe… (More on Solution)