A homogeneous mixture of two or more non-reactive substances is called solution. Solution is prepared by dissolving one or more substances in another substance.
Solute and solvent are the two components of the solution. The dissolved component is called solute whereas component in which solute is dissolved is referred to as solvent. A solution will contain only one solvent but can contain many solutes.
Physical properties such as density and refractive index are uniform throughout the solution. However, these properties can vary depending on solvent and solute ratio. For example, physical properties of a 10 % (w/w) sugar solution will be different from 20% (w/w) sugar solution.