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The stabillization of the dispersed phas...

The stabillization of the dispersed phase in a lyopobic sol is due to

A

The adsorption of charged substances on dispersed phase.

B

The large electro-Kinetic potential developed in the colloid.

C

The formation of an electrical layer between two phase.

D

The viscosity of the medium

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The correct Answer is:
C
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The stabilization of a dispersed phase in a lyopobic colloid is due to

coagultion is the process by which the dispersed phase of a colloid is made to aggregate and thereby separtate from the continuous phase. The minimum concetration of an eletrolyte in milli-moles per litre of the electrolyte solution which required to cause the caogultion of colloidal sol is called coagution value . therefroe higher is the coagulatings power of effective ion, smaller will be the coagultion value of the electrolyte. the coagulation of colloidal particles fo the sol can be caused by :

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What is the dispersed phase and dispersion medium in gel?

Emulsions are normally prepared by shaking the two components together vigorously although some kind of emulsifiying agent usually has to added to stabilize the product. This emulsifying agent amy be a soap or other sufactant (surface active) sepcies or a lyophilic sol that forms a protective film around the dispersed phase. Emulsion broadly classified into two types: (i) Oil in water emulsions (O/W): Oil acts as dispersed phase and water acts as dispersion medium. (ii). Water in oil emulsion (W/O): Water acts as dispersed phase and oil acts as dispersion medium Due test, dilution test may be emplyoyed for identification of emulsions. Q. Read two statment s: (1) milk is an example of oil in water (O/w) type emulsion (2) cold cream is an example of water in oil (W/O) type emulsion

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 will have maximum flocculation value for aresnic sulphide sol?

Among the colloids cheese (C), milk (M) and smoke (S), the correct combination of the dispered phase and dispersion medium, respectively is :

Among the colloids cheese (C), milk (M) and smoke (S), the correct combination of the dispered phase and dispersion medium, respectively is :

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?

CENGAGE CHEMISTRY ENGLISH-SURFACE CHEMISTRY-Exercises Single Correct
  1. Which of the following act as a protective colloids?

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  2. An emulsifier is an agent which:

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  3. The stabillization of the dispersed phase in a lyopobic sol is due to

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  4. The diameter of collodal particle is of the order

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  5. The process of passing of a precipitate into colloidal solution on add...

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  6. Tyndall effect is not observed in

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  7. The process of removing dissolved impuities from a colloidal system by...

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  8. Movement of colloidal particles under the influence of electric field ...

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  9. Smoke is a dispersion of:

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  10. The colloidal sol of As(2)S(3) prefers to adsorb

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  11. A freshly formed ppt of SnO(2) is peptized by a small amount of NaOH ....

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  12. Smoke has generally blue tinge. It is due to

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  13. Adsorption is a process in which a substance accumulates on the ………………...

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  14. What is sorption ?

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  15. In the adsorption of oxalic acid by activated charcoal, the activated ...

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  16. There is desorption of physical adsorption when

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  17. The rate of chemisorption a. increaeses with decreases in temperatur...

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  18. Which of the following is not a characteristic of chemisorption?

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  19. Chromatography is a technique based on. (a)Adsorption and then desor...

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  20. Oil-soluble dye is mixed with water-in-oil emulsion, then

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