Question

Which one of the following is an example for multimolecular colloid?
A.Aqueous starch sol
B.Aqueous enzyme sol
C.Alcoholic polystyrene sol
D.Aqueous sol of sodium lauryl sulphate
E.Sulphur sol in water

Answer 1

Hint:
Multimolecular colloids can be defined as “When a large number of atoms or small molecules (having diameters of less than 1 nm) of a substance combine together in a dispersion medium to form aggregates having size in the colloidal range, the colloidal solutions thus formed are called multimolecular colloids.”

Complete step by step answer:
Whenever any large number of atoms or the smaller molecules that are having the diameters of less than $1nm$ of any of the substance that are combining together in any of the dispersion medium to form together any aggregates having size in the colloidal range. These types of the colloidal solutions thus formed are termed as multimolecular colloids.
Here in the multimolecular colloids the atoms or the particles are held together by the weak van der Waals force of attraction. These are often considered as one of the weakest forces in chemistry. For example, gold sol contains particles of various sizes having several atoms. Another example is sulfur solution.
Sols of protein are present in macromolecular colloids and soap solution is present in associated colloids.
Among the given colloids we can clearly say that the Sulphur sol (lyophobic sols) in water is an example of multimolecular colloid. This in because of their insolubility with the water molecules and the behaviors they show in the aqueous medium
Therefore, the answer would be option E, Sulphur sol in water.

Note:
Multimolecular colloids are generally formed by the aggregation of a large number of simple molecules, macromolecular colloids consists of macromolecules having size in the colloidal range. On the other hand, associated colloids also called micelles, are generally electrolytes. They exist as ions at low concentration.