Question

the substance distributed as colloidal particle is called

Answer 1

A homogeneous mixture is distributed as colloidal particle, this is because particles in a homogeneous mixture is dispersed evenly throughout the solution. For example, homogenized milk which has naturally existing clumps of fat that
 are broken down into smaller portions allowing even distribution throughout the milk. 
This therefore prevents the fats from separating out. 

Therefore a homogeneous mixture is distributed as colloidal particle.