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What are associated colloids or micelles...

What are associated colloids or micelles?

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Certain substances like soaps and detergents belaive as electrölytes at low concentration. How ever, at ligh concentration they constitute colioidal sols, which are known as associated colloids The colloidal behaviōur of such substạnces is due to the formation of aggregates or clusters in solutions. Such aggregated particles are known as micelles. Thus, micelle may.be defined as the cluster or aggregated particles formed by association colloids in solutions. Micelles are genęrally formed by the specific type of molecules which have lyophilic as well as lyophobic ends. Such molecules are known as sur" face active molecules or surfactant molecules. Sodium ofeate .C_17 H_3 COO^- Na^+. (one of the soaps) is a typical example of such type of molecule. The long hydrocarbon part of oleate radical
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V PUBLICATION-SURFACE CHEMISTRY-QUESTION BANK
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  2. Give four uses of emulsions.

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  3. What are associated colloids or micelles?

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  4. Explain the terms with the suitable examples: i. Alcosol ii. Aerosol ...

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

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  6. Categorises following cases of adsorption in to physisorption and che...

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  7. "Adsorption is a surface phnomenon" comment on this statement

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  8. When adsorption isobar is drawn for a paricular case, it was fount tha...

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  11. Cite an example to show that enzymes are highly specific.

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  12. When sunlight enters into a dark room through a slit, what will you o...

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  13. Following properties are associated with lyophilic and lyophobic collo...

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  14. Some of the important applications of colloids are given below. Ident...

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  15. As2 S3 sol particles are negatively charged. The. sol can be precipit...

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  16. A graph showing the adsorption isotherm according to Freundlich isothe...

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  17. Which will be adsorbed more readily on the surface of charcoal.and why...

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  18. What type of colloidal sols are formed in the following i. Sulphur vap...

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  19. In chemisorption why adsorption Ist ,increases and then decreases?

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  20. What happens when a freshiy prepared 'Fe(OH)3' is shaken with a Iitte ...

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