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The dispersion medium in aerosol is...

The dispersion medium in aerosol is

A

water

B

alcohol

C

air

D

benzene

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Freshly Prepared precipitates can be easily dispersed by shaking it with dispersion medium. This process is called

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Classify colloids where the dispersion medium is water. State their characteristics and write an example of each of these classes.

Read the given passage and answers following questions : Emulsion: It is a colloidal mixture in which both the dispersed phase and the dispersion medium are liquids. The two or more liquids present in the mixture are generally immiscible in nature. Example: Milk. Gel: It is a colloid in which the dispersed phase i.e. liquid has combined with the dispersion medium i.e. solid to produce a semisolid material. Example: jellies. Answer the following questions : What is colloidal mixture ?

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Thomas Graham in 1861, during his work on diffusion found that certain substances such as gelatin, albumin, glue,etc. Diffused at very low rate and were called colloids. The colloid particles have the size in the range of 1 to 100nm consisting of dispersed phase and dispersion ,( medium. The dispersed phase or dispersion medium may be solid, liquid 6r even a gas. Depending upon the nature of dispersion medium or dispersed phase, 8 types of systems are possible except for a gas dispersed in another gas because the gases are completely miscible with each other. The substances which have strong interaction with the dispersion medium are called lyophilic colloids while those which do not pass into collofdalstate readily are called lyophobic colloids. Lyophobic sols are much less stable and are irreversible. What is dispersed phase and dispersion medium ?

Read the given passage and answers following questions : Thomas Graham in 1861, during his work on diffusion found that certain substances such as gelatin, albumin, glue,etc. Diffused at very low rate and were called colloids. The colloid particles have the size in the range of 1 to 100nm consisting of dispersed phase and dispersion medium. The dispersed phase or dispersion medium may be solid, liquid or even a gas. Depending upon the nature of dispersion medium or dispersed phase, 8 types of systems are possible except for a gas dispersed in another gas because the gases are completely miscible with each other. The substances which have strong interaction with the dispersion medium are called lyophilic colloids while those which do not pass into colloidal state readily are called lyophobic colloids. Lyophobic sols are much less stable and are irreversible. Answer the following questions : How many types systems are possible depending upon the nature of dispersion medium?

Read the given passage and answers following questions : Thomas Graham in 1861, during his work on diffusion found that certain substances such as gelatin, albumin, glue,etc. Diffused at very low rate and were called colloids. The colloid particles have the size in the range of 1 to 100nm consisting of dispersed phase and dispersion medium. The dispersed phase or dispersion medium may be solid, liquid or even a gas. Depending upon the nature of dispersion medium or dispersed phase, 8 types of systems are possible except for a gas dispersed in another gas because the gases are completely miscible with each other. The substances which have strong interaction with the dispersion medium are called lyophilic colloids while those which do not pass into colloidal state readily are called lyophobic colloids. Lyophobic sols are much less stable and are irreversible. Answer the following questions : Which substances have strong interactions with dispersion medium?

MODERN PUBLICATION-SURFACE CHEMISTRY-EXERCISE
  1. Explain the following- Uses of brass alloy.

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  2. The efficiency of a protective colloid is described in terms of

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  3. The dispersion medium in aerosol is

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  4. The function of enzymes in the living system is to

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  5. The ultrafiltration Process of purification of colloidal solutions is ...

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  6. In physical adsorption the forces associated are

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  7. Milk is a colloidal solution of ................ in ............ .

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  8. Colloids can be purified by peptization. (True/False)

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  9. The protective power of colloids is measured in the unit ................

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  10. The curve showing the variation of adsorption with pressure at constan...

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  11. Differentiate between absorption and adsorption.

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  12. What do you understand by true solution, colloidal solution and suspen...

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  13. Comment on the statement that “colloid is not a substance but a state ...

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  14. An atom of element E contains 3 protons, 3 electrons and 4 neutrons : ...

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  15. How are colloids classified on the basis of : interaction between disp...

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  16. How will you prepare a collidal solution of gold?

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  17. Explain electrophoresis. How is it helpful in causing coagulation of c...

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  18. Write two differences between sols and emulsions.

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  19. Explain the following- Uses of bronze alloy.

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  20. State whether the statement is true or false- Bronze alloy is used to ...

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