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Write three differences between physical...

Write three differences between physical and chemical adsorption.

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Physical adsorption is :

SHARAM PUBLICATION-SURFACE CHEMISTRY-EXERCISE
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  2. Fill in the blanks : Increasing the adsorbing power of an adsorbent by...

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  3. Write three differences between physical and chemical adsorption.

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  4. What are colloids ? How do they differ from crystalloids ?

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  5. What are lyophilic and lyophobic colloids ? Give one example of each.

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  6. What is the difference between colloidal solution, gel and emulsion ?

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  7. What happens when colloidal solution of Fe (OH)3 is mixed with that of...

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  8. What do you mean by hydrosol and alcosol ?

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  9. Why is a colloidal sol stable?

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  10. What happens to gold sol if gelatine is added to it ?

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  11. Why is gelatine added to ice cream ?

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  12. Why is a peptizing agent added to convert a precipitate into colloidal...

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  13. Why Cottrell's smoke precipitator is fitted at the mouth of chimney us...

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  14. How do the aquasols and solid aerosols differ ?

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  15. The adsorption of a gas on the surface of the solid is generally accom...

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  16. What causes Brownian movement in colloidal solution ?

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  17. What do you mean by a positive and negative catalyst ?

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

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  19. What is the difference between multi molecular and macro molecular col...

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  20. Give an example where physisorption changes to chemisorption with rise...

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