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Explain the observations : Coagulation...

Explain the observations :
Coagulation takes place when sodium chloride solution is added to a colloidal solution of ferric hydroxide.

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PRADEEP-SURFACE CHEMISTRY -SHORT ANSWER QUESTIONS (III. COLLOIDS)
  1. Colloidal arsenious sulphide is readily precipitated by a small amount...

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

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

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

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

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

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

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  8. What is zeta potential ? Explain briefly.

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

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

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

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  12. What is collodion ?

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  13. Differentiate between peptization and coagulation.

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

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

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

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

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  18. Describe the cleaning action of soap.

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

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

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