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Why are lypolhilic colloids more stable ...

Why are lypolhilic colloids more stable than hybrobic colloids ?

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In lyophilic colloids, there is attraction between the particles of dispersed phase and dispersion medium. In cace water is dispersion medium, the particles get hybrated. The energy released is responsible for their stability. Contary to this, there is repulsion between the two in lyophobic colloids and this results in less stability.
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Explain the following observation: a. Lyphilic colloid is more stable than lyophobic colloid. b. Coagulation takes place when sodium chloride solution is added to a colloidal solution of ferric hydroxide. c. Sky appears blue in colour.

Why are lyophilic colloids stable?

Assertion: Lyophilic colloids are more stable than lyophobic colloids. Reason: In lyophobic system, the dispersed particles are more solvated than in lyophilic system.

Hydrophilic colloids are stable due to

A colloid is a

In a colloidal state, the particle size of he dispersed phase ranges between 10^(3) to 10^(6) pm and the colloidal sol is of heterogeneous nature. Depending upon the ease with which these sols are formed, the colloidal sols are cassified as lyophilic and lyophobic. THe stability of a colloidal sol is due to the presence of charge on the sol particles and the neutralisation of the same is known as coagulation or precipitation. The coagulationg power of the active ions of he electrolytes can be compared with the help of Hardy-Schulze Law. The protecting power of the lyophilic sols can be compared with the help of gold number. Lesser the value of gold number, more will be the protecting power of the lyophilic sol. Lyophilic sols are more stable than lyophobic sols because

DINESH PUBLICATION-SURFACE CHEMISTRY -QUESTION FROM BOARD EXAMINATIONS
  1. If a strong beam of light is passed through a colloidal sol place in a...

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  2. Why does clear sky appear blue ?

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  3. Why are lypolhilic colloids more stable than hybrobic colloids ?

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  4. Give one example each of multimolecular and macro-molecular colloids.

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  5. What happens when colloidal solution of fe(OH)(3) and As(2)S(3) are mi...

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  6. What happens when freshly precipitated ferric hydroxide is treated wit...

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  7. Why is pyophobis sol easily congulated as compared to lyophilic sol ?

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  8. Mention two ways by which lyophobic colloids can be coagulated.

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  9. What will happen when a small amount of NaCl solution is added to hydr...

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  10. Why does physisorption decrease with increase in temperature ?

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  11. A synthetic rubber which is resistant to the action of oils gasoline a...

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  12. What is Tyndall Effect?

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  13. What is coagulation process ?

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  14. What is an emulsion ?

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  15. Name two types of adsorption phenmenon.

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  16. Name the catalyst and promoter in the Haber's process for the manufact...

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  17. What are the physical states of the dispersion medium and dispersed ph...

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  18. Adsorption of a gas on the surface of solid is sgenerally accompanied ...

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  19. How does increase in tempeature affect both physical and chemical adso...

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  20. What do you understand by shape selective catalysis? Why are zeolites ...

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