Which of the following are the properties of a solution?
It is composed of only one phase
The particles of a solution are smaller than 1nm in diameter
Solution is a homogeneous mixture
A solution is a homogeneous mixture and the particles are smaller than 1nm in diameter (the solute and solvent molecules cannot be distinguished even under a microscope), so they cannot be seen with naked eyes. A solution has only one phase and is stable in nature.
A solution may exist in any state. An alloy is an example of a solid solution.