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What is physical adsorption....

What is physical adsorption.

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If the adsorbate is held on a surface by weak van der Walls forces, the adsorption is called physical adsorption.
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PRADEEP-SURFACE CHEMISTRY -ADDITIONAL QUESTIONS (VERY SHORT ANSWER QUESTIONS)
  1. What do you mena by specific surface area of an adsorbent ?

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  2. Which will adsorb more gas, a lump of charcoal or its powder and why ?

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  3. What is physical adsorption.

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  4. Why is chemisorption irreversible ?

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  5. What is meant by chemical adsorption?

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  6. Of physisorption and chemisorption which type of adsorption has a high...

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  7. Give the expression of Freundlich isotherms.

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  8. What from Freundich adsorption isotherm equation will take at high pre...

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  9. How does increase in tempeature affect both physical and chemical adso...

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  10. Write one similarity between physisorption and chemisorption.

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  11. Define shape selective catalysis. Give an example of a shape selective...

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  12. What is ZSM-5 ? What is its formula ?

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  13. Name two industrial processes in which heterogeneous catalysts are emp...

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  14. Indicate a chemical reaction involving a homogeneous catalyst.

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  15. Write down the heteroheneous catalyst involved in the polymerisation o...

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  16. What is the role of desorption in the process of catalysis ?

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  17. What is the range of particle size in colloidal solution in nm?

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  18. Give an example of an associated colloid?

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  19. Define Kraft temperatuer.

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  20. Write two differences between multimolecular colloids and macromolecul...

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