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What are lyophilic and lyophobic sols?Gi...

What are lyophilic and lyophobic sols?Give one example of each type ? Why is hydrophobic sol easily coagulated ?

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The lyophobic sols are less stable because their stability is due to charge only. If the charge is removed, the particles will come nearer to each other to form aggregates i.e., they will coagulate and settle down. On the other hand, the stability of lyophilic sols is due to charge as well as solvation of colloidal particles. Therefore, these are not.
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MODERN PUBLICATION-SURFACE CHEMISTRY-NCERT FILE (SOLVED) (NCERT TEXTBOOK EXERCISES )
  1. How are the colloidal solutions classified on the the basis of physica...

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

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

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  4. What is the difference between multimolecular and macromolecular collo...

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

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  6. Physical states of components colloids classified on the basis ?

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  7. Nature of dispersion medium colloids classified on the basis ?

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  8. interaction between dispersed phase and dispersion medium colloids cla...

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  9. When a beam to light is passed through colloidal solution.

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

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

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

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  13. What is demulsification ? Name two demulsifiers.

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

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  15. Give four examples of heterogeneous catalytic reactions.

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

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  17. Descirbe some features of catalysis by zeolites.

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  18. What is shape - selective catalysis ?

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  19. Explain the following tem : Electrophoresis.

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

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