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What is ment by coagulation of colloidal...

What is ment by coagulation of colloidal solution ? Describe briefly and three methods by which coagulation of lyophobic sols can be carried out.

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The coagulation of the lyophobic sols can be carried out by

Name a process by which coagulation of lyophobic sol can be carried out.

What is meant by coagulation of a colloidal solution? Name any method by which coagulation of lyophobic sols can be carried out.

Read the given passage and answer the question that follow: Colloidal particles always carry an electric charge which may be either positive or negative. For example, when AgNO_3 solution is added to KI solution, a negatively charged colloidal sol is obtained. The presence of equal and similar charges on colloidal particles provide stability to the colloidal sol and if, somehow, charge is removed. coagulation of sol occurs. Lyophobic sols are readily coagulated as compared to lyophilic sols. Name one method by which coagulation of lyophobic sol can be carried out.

Read the given passage and answer the question that follow: Colloidal particles always carry an electric charge which may be either positive or negative. For example, when AgNO_3 solution is added to KI solution, a negatively charged colloidal sol is obtained. The presence of equal and similar charges on colloidal particles provide stability to the colloidal sol and if, somehow, charge is removed. coagulation of sol occurs. Lyophobic sols are readily coagulated as compared to lyophilic sols. Name one method by which coagulation of lyophobic sol can be carried out.

Write a method by which lyophobic colloids can be coagulated.

MODERN PUBLICATION-SURFACE CHEMISTRY-REVISION EXERCISE (SHORT ANSWER QUESTION)
  1. Define each of the following terms: (i) Micelles (ii) Peptization (i...

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  2. TYNDALL EFFECT

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  3. What is ment by coagulation of colloidal solution ? Describe briefly ...

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  4. Describe a comspicuous change observed when (i) a solution of NaCl...

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  5. Enzyme Catalysis

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  6. Explain the difference between a homogeneous and heterogeneous catalys...

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  7. Taking two examples of heterogeneously catalyzed reactions, explain ho...

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

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  9. Give two differences between macromolecular colloids and associated co...

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  10. Explain the following terms : (i) "Peptization"" "(ii)"Loyphobic co...

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  11. What are associated colloids ?

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  12. Give reason why a finely divided substance is more effective as an ads...

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  13. What is an adsorption isotherm? Describe Freundlich adsorption isother...

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  14. What is the difference between oil/water (O/W) type and water/oil (W/O...

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  15. Physical adsorption is :

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  16. Give one example of oil in water type emulsion.

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  17. Give two differences between lyophilic and lyophobic colloids.

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  18. What is heterogeneous catalysis? Give an example.

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  19. The equation for Freundlich adsorption isotherm is

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  20. What is 'Tyndall effect' ? Name two mixtures which show this effect.

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