Which one of the following is not a property of the solution?

Solution is a homogeneous mixture with its particles uniformly distributed throughout the solution.

The properties of a solution are:

a) Particle size is smaller than 1 nm. They are not visible through naked eyes.

b) As the particles are too small, they do not scatter the light when passed through them.  Hence, path light is not visible in a solution.

c) Due to their small size of particles, they cannot be separated by filtration.

d) A solution is stable, so its solute particles do not settle down when left undisturbed.