A mixture is defined as a mass obtained by mixing up two or more chemically non-reactive substances in any proportion by weight.
A homogeneous mixture is defined as a mass in which the particles of the components of the mixture are equally distributed.
A heterogeneous mixture is defined as a mass in which the particles of components of the mixture are not equally distributed.
Solution is defined as the homogeneous mixture of two or more than two substances that can be formed either by mixing suitable solid in liquid or by liquid in liquid.
Colloid is a homogeneous mixture in which the diameter of particles of components ranges in between that of particles of a solution and suspension.
Suspension is a heterogeneous mixture in which the diameter of the particle is 10-5 cm or larger.