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Give reason why a finely divided substan...

Give reason why a finely divided substance is more effective as an adsorbents?

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Why is a finely divided stustance more effective as an adsorbent?

Give reason for the following observations : (i) When Silver nitrate solution is added to Potassium iodide soltuion , a negatively charge colloidal solution is formed. (ii) Finely divided substance is more effective as an adsorbent. (iii) Lyophilic colloid are also called reversible sols.

If a solid is finely divided:

A catalyst in the finely divided form is most effective because :

MODERN PUBLICATION-SURFACE CHEMISTRY-REVISION EXERCISE (SHORT ANSWER QUESTION)
  1. Explain the following terms : (i) "Peptization"" "(ii)"Loyphobic co...

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  2. What are associated colloids ?

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

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

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

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  6. Physical adsorption is :

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

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  8. Give two differences between lyophilic and lyophobic colloids.

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  9. What is heterogeneous catalysis? Give an example.

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  10. The equation for Freundlich adsorption isotherm is

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

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  12. Define the following terms : (i) Kraft temperature (ii) Peptizati...

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  13. CMC (Critical Micelle Concentration) is

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  14. When negatively charged colloids like As(2)S(3) sol is added to positi...

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  15. (a) In reference to Freundlich adorption isotherm write the expression...

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  16. Lyophilic sols are

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  17. (a) In reference to Freundlich adorption isotherm write the expression...

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  18. Why dows physisoption decrease with increase of temperature ?

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  19. Why are powdered substances more effective adsorbent than their crysta...

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  20. Give the decreasing order of flocculating power of the following ions ...

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