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Explain briefly any three physical metho...

Explain briefly any three physical methods for the preparation of lyophobic sols.

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PRADEEP-SURFACE CHEMISTRY -SHORT ANSWER QUESTIONS (III. COLLOIDS)
  1. Explain the following terms giving a suitable example for each : (i)...

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  2. Give four difference between lyophilic and lyophobic colloids.

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  3. Explain briefly any three physical methods for the preparation of lyop...

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  4. What are lyophobic sols ? Describe the preparation of a colloidal solu...

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  5. What is peptization ? What is cause of peptization ? Illustrate with o...

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  6. Gold sol is prepared by Breding's arc method.

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  7. Define each of the following terms: (i) Micelles (ii) Peptization (i...

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  8. Explain Hardy-Schulze rule and peptization. Give examples.

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  9. Colloidal arsenious sulphide is readily precipitated by a small amount...

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  10. Explain the observations : Lyophilic colloid is more stable than ly...

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  11. Explain the observations : Coagulation takes place when sodium chlor...

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  12. Explain the observations : Sky appears blue in colour.

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  13. Explain what will you observe when an electrolyte (NaCl) is added to...

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  14. Explain what will you observe when an electric current is passed thr...

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  15. Explain what will you observe when a beam of light is passed through...

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  16. What is zeta potential ? Explain briefly.

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  17. Define the following and give an example of each (a) Coagulation (b)...

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  18. Colloids have many characteristic properties : Among these, Tyndall ef...

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  19. Heat of adsorption is greater for chemisorption than physiorption. Why...

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  20. What is collodion ?

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