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Answer the following question:
 
Explain the following giving examples.
 
(a). Saturated solution: A becomes saturated if the starts separating at the bottom of the container in which the solution is being prepared at a given temperature. A saturated solution generally becomes unsaturated upon heating.
 
(b). Pure substance: A means a single substance (or matter) that cannot be separated into other kinds of matter by any process.
 
(c). Colloid: Colloidal solutions are also heterogeneous in nature like , but they have smaller sizes of the particles which are distributed. It ranges between 1 nm to 100 nm, i.e., the particle of true solution and suspension.
 
(d). Suspension: A may be defined as a heterogeneous mixture in which the  particles are spread throughout the liquid without dissolving in it. They settle as precipitate if the suspension is left undisturbed for some time.