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Colloids have many characteristic proper...

Colloids have many characteristic properties : Among these, Tyndall effect is an optical property and coagulation is the process of settling-down of colloidal particles.
(i) What is Tyndall effect ?
(ii) State Hardy-Schulze rule which deals with the coagulation of colloids by the addition of an electrolyte.
(iii) What is a protective colloid?

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Tyndall Effect And Properties Of Colloidal Solution

What is Tyndall effect ? How does it help in noticing the particles present in a colloidal solution ?

Why is Tyndall effect shown by colloidal particles? State four instances of observing the Tyndall effect.

What are lyophilic and lyophobic colloidal? Which of these sols can be easily coagulated on the addition of small amount of electrolytes?

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PRADEEP-SURFACE CHEMISTRY -SHORT ANSWER QUESTIONS (III. COLLOIDS)
  1. What is zeta potential ? Explain briefly.

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

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

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

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  5. What is collodion ?

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  6. Differentiate between peptization and coagulation.

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  7. Explain the following with example : (a) Kraft temperature (b)Coagu...

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  8. What are protective colloids? How are the colloids stabilised? Explain...

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  9. What are emulsions ? Write two applications of emulsification.

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  10. What are emulsion ? How will you prepare a stable emulsion ? What are ...

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  11. Describe the cleaning action of soap.

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  12. What are the two classes of emulsions? Give one example of each class....

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  13. Mention two uses of each of colloids and emulsions.

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  14. Distinguish between true solution and colloidal solution of the same c...

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  15. How are the following sols in water prepared ? (i) Sulphur " "...

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  16. Explain why delta are formed where river and sea water meet.

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  17. Same substance can act both as colloid and crystalloid. (T/F)

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  18. Artificial rain is caused by spraying salt over clouds. (T/F)

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  19. When a beam of light is passed through a colloidal sol, the path of th...

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  20. (a) Give one main difference between lyophilic anc lyophobic colloids....

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