a true solution is a homogeneous mixture of two or more than two substance.
solute cannot be seen even with microscope.
the size of particles is about 10^-10m
the constitutents cannot be separated by filtration.
a collidal is homogeneous looking,but hetergeneous mixture.
particles can be seen only with powerful micrscope.
size of the particle is b/w 10^-7 and 10^-9.
cannot be separated by filtraton