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Give four uses of emulsion....

Give four uses of emulsion.

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Various uses of emulsions are as follows `:`
`a.` The concentration of sulphide ore by froth floatation process is based on emulsification.
`b.` Cleansing action of soap and detergents is due to the formation of an emulsion between gas dirt and soap solution. ltbr. `c`. Milk is an emulsion of fat in water. ltbr. `d.` Cosmetics, lotions, creams, hair dyes, shampoos and many drugs, and ointments are emulsions. In the form of emulsions, these are more effective.
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Give some examples of emulsions that you come across in daily life.

Emulsions are also the colloidal solutions in which disperse phase as well as dispersion medium are liquids. It may be oil in water or water in oil type. Bancroft proposed that the phase in which the emulsifier is more soluble becomes the outer phase of the emulsion. Emulsififers can be used to stabilize the emulsion. Soaps, detergents, proteins and gum, etc., are used as emulsifiers. Milk is an emulsion in which:

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CENGAGE CHEMISTRY-NCERT BASED EXERCISE-NCERT Exercise
  1. What role does adsorption play in heterogeneous catalysis ?

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  2. Adsorption is aways exothermic.

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  3. How are the colloidal solutions classified on the the basis of physica...

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  4. Disuss the effect of pressure and temperature on the adsorption of gas...

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  5. What are lyophilic and lyophobic sols?Give one example of each type ? ...

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  6. What is the difference between multimolecular and macromolecular colli...

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  7. What are enzymes ? Write in brief the mechanism of enzyme catalysis ?

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  8. Explain what is observed when ltbr. a. An electrolyte NaCl is added to...

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  9. What are emulsions ? What are their different types ? Give an example ...

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  10. How do emulsifiers stabilise emulsion ? Name two emulsifiers.

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  11. Action of soap is due to emulsification and micelle formation. Comment...

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  12. Give four examples of heterogeneous catalytic reactions.

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  13. What do you mean by activity and selectivity of catalysts ?

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  14. Descirbe some features of catalysis by zeolites.

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  15. What is shape - selective catalysis ?

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  16. Explain the following terms : {:(a. El etropho resis , b. Coagulati...

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  17. Give four uses of emulsion.

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  18. What are micelles ? Give an example of a micelle system.

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  19. Explain the following terms with suitable examples : a. alc osol,b....

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  20. Comment on the statement that " colloid is not a substance but state ...

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