Why isn't colliod a true solution?

Answer 1

A colloid isn't a true solution because its particles are larger than those in a true solution, typically ranging from 1 nanometer to 1 micrometer in size. In a true solution, solute particles are completely dissolved at the molecular or ionic level, resulting in a homogeneous mixture that does not scatter light. In contrast, colloidal particles remain suspended and can scatter light, a phenomenon known as the Tyndall effect. Additionally, colloids do not settle out over time like larger particles in suspensions, but they do not exhibit the same uniformity as true solutions.