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Give one example of oil in water type em...

Give one example of oil in water type emulsion.

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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

Which of the following is an example of oil in water emulsion?

Emulsions are also called the colloidal solutions in which the disperse phase as well as dispersion medium are liquids. It may be oil-in-water or water-inoil type Emulsifiers can be sued to stabilize the emulsion. Soaps, detergents, proteins, and gums are used as emulsifiers. Which of the following examples is/are oil-in-water-type emulsion?

Give one test to distinguish whether the given emulsion is oil-in-water-type emulsion.

MODERN PUBLICATION-SURFACE CHEMISTRY-REVISION EXERCISE (SHORT ANSWER QUESTION)
  1. What is the difference between oil/water (O/W) type and water/oil (W/O...

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  2. Physical adsorption is :

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  3. Give one example of oil in water type emulsion.

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  4. Give two differences between lyophilic and lyophobic colloids.

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  5. What is heterogeneous catalysis? Give an example.

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  6. The equation for Freundlich adsorption isotherm is

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  7. What is 'Tyndall effect' ? Name two mixtures which show this effect.

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  8. Define the following terms : (i) Kraft temperature (ii) Peptizati...

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  9. CMC (Critical Micelle Concentration) is

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  10. When negatively charged colloids like As(2)S(3) sol is added to positi...

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  11. (a) In reference to Freundlich adorption isotherm write the expression...

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  12. Lyophilic sols are

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  13. (a) In reference to Freundlich adorption isotherm write the expression...

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  14. Why dows physisoption decrease with increase of temperature ?

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  15. Why are powdered substances more effective adsorbent than their crysta...

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  16. Give the decreasing order of flocculating power of the following ions ...

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  17. Explain the cleansing action of soaps.

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  18. Classify the type of colloidal sol in the following based on the basis...

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  19. What is Hardy- Schulze law?

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  20. Write differences between physisorption and chemisorption.

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