What Is Sol ,Emulsion, Gel, Colloid, Suspension, True Solution.

Give examples also

1) A colloid is a heterogeneous system in which one substance is dispersed (dispersed phase) as very fine particles in another substance called dispersion medium. It is the intermediate system between a solution and a suspension. The size of colloidal particles is between 1 nm and 1000 nm. For example, milk, butter, hair cream etc are colloids. 

2) A suspension is also heterogeneous system in which the size of solute particle is large (more than1000 nm). As a result, the solute particle does not dissolve in the solvent and settles down at the bottom in the solvent. Therefore the solute particles in a suspension can be easily seen with a naked eye. Example a solution of sand in water is a suspension. 

3) A true solution is the solution in which solute particles are homogeneously mixed to form a single phase solution. It is a clear and transparent solution which can easily pass through ordinary filter paper or animal membrane. Its particles are not visible. For example, a mixture of sugar in water is a true solution.

4) A sol is a type of colloid in which solid is the dispersed phase and liquid is the dispersion medium. Examples include milk of magnesia, mud etc.

5) An emulsion is a type of colloid in which both the dispersed phase and dispersion medium are liquids. Examples include milk, face cream etc. 

6) A gel is also a category of colloid in liquid is the dispersed phase and solid is the dispersed medium. Examples include jelly, cheese etc.