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Question
According to the classification based on the type of the particles of dispersed phase, sulphur sol belongs to which of the following category?
According to the classification based on the type of the particles of dispersed phase, sulphur sol belongs to which of the following category?
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Solution
The correct option is B Multimolecular colloid
A multimolecular colloid consists of an aggregate of small particles/molecules held together by van der Waals' forces. The Sulphur sol is made up of a thousand or more S8 molecules – all held together by van der Waals' forces.
On the other hand, a macromolecular particle is itself a large molecule (e.g. starch, cellulose and proteins). When these are dissolved in a suitable solvent such that the dispersed particles are within the colloidal range, we obtain macromolecular colloids. These sols resemble true solutions and they tend to be highly stable.
An associated colloidal system behaves as a normal solution at low concentrations but becomes colloidal at higher concentrations. In aqueous solutions, this characteristic is exhibited mainly by organic compounds with long hydrophobic hydrocarbon chains and hydrophilic head groups like carboxylate group (COO−), or sulfonic acid group SO3O−.
Since these long oily hydrocarbon chains hate water, they will be oriented so that the hydrophobic ends of the molecules are joined and are shielded from the solution by the hydrophilic head groups. As a result, these molecules aggregate together in the form of micelles (as shown).
A multimolecular colloid consists of an aggregate of small particles/molecules held together by van der Waals' forces. The Sulphur sol is made up of a thousand or more S8 molecules – all held together by van der Waals' forces.
On the other hand, a macromolecular particle is itself a large molecule (e.g. starch, cellulose and proteins). When these are dissolved in a suitable solvent such that the dispersed particles are within the colloidal range, we obtain macromolecular colloids. These sols resemble true solutions and they tend to be highly stable.
An associated colloidal system behaves as a normal solution at low concentrations but becomes colloidal at higher concentrations. In aqueous solutions, this characteristic is exhibited mainly by organic compounds with long hydrophobic hydrocarbon chains and hydrophilic head groups like carboxylate group (COO−), or sulfonic acid group SO3O−.
Since these long oily hydrocarbon chains hate water, they will be oriented so that the hydrophobic ends of the molecules are joined and are shielded from the solution by the hydrophilic head groups. As a result, these molecules aggregate together in the form of micelles (as shown).
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