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Depending upon the type of the particles...

Depending upon the type of the particles of the dispersed phase, colloids are classified as.

A

multimolecular colloids

B

macromolecular colloids

C

associated colloids

D

all of these

Text Solution

Verified by Experts

The correct Answer is:
D
Multimolecular colloids are formed when (on dissolution) a large number of atoms (or small molecules) of a substance aggregate together to form species having sixe in the colloidal range (diameter`lt1mm`). Macromolecular colloids are formed when macromolecules form solution (in suitable solvents) in which the size of the macromolecules lies in the colloidal range.
Associated colloids are those substance which behave as normal strong electrolytes at law concentratioons but exhibit colloidal behaviour (at higher concentrations) due to the formation of aggregates. The aggregated particles so formed are called micelles.
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Knowledge Check

  • Collidal dispersion have been classified into different types depending upon the physical state of the dispersed phases and the dispersion medium. They are prepared in the industry or in the laboratory by a number of methods and then purified. The protective action of lyophilic colloids was studied by Zsigmondy and he introduced a term called gold number. Which of the following does not form a lyophilic colloid?

    A
    Rubber dissolved in benzene.
    B
    White or the egg dissolved into water.
    C
    Common salt added into benzene.
    D
    Stannous chloride solution added to gold chloride solution.

  • Collidal dispersion have been classified into different types depending upon the physical state of the dispersed phases and the dispersion medium. They are prepared in the industry or in the laboratory by a number of methods and then purified. The protective action of lyophilic colloids was studied by Zsigmondy and he introduced a term called gold number. Which of the following has minimum gold number?

    A
    Albumen
    B
    Gelatin
    C
    Starch
    D
    Gum arabic

  • Collidal dispersion have been classified into different types depending upon the physical state of the dispersed phases and the dispersion medium. They are prepared in the industry or in the laboratory by a number of methods and then purified. The protective action of lyophilic colloids was studied by Zsigmondy and he introduced a term called gold number. In the experiment on electro-osmosis in which of the following the level of the dispersion medium will fall on the cathode side.

    A
    `Fe(OH)_(3)` sol
    B
    `As_(2)S_(3)` sol
    C
    Gold sol
    D
    Starch sol