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Differentiate physisorption and chemisor...

Differentiate physisorption and chemisorption.

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SURA PUBLICATION-SURFACE CHEMISTRY -SHORT ANSWER QUESTIONS
  1. Give two important characteristics of physisorption.

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  2. Differentiate physisorption and chemisorption.

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  3. In case of chemisorption, why adsorption first increases and then dec...

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  4. Which will be adsorbed more readily on the surface of charcoal and why...

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  5. Heat of adsorption is greater for chemisorptions than physisorption. W...

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  6. In a coagulation experiment, 10 mL of a colloid (X) is mixed with dist...

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  7. Peptising agent is added to convert precipitate into colloidal solutio...

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  8. What happens when a colloidal sol of Fe(OH)3 and AS2O3 are mixed?

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  9. What is the difference between a sol and a gel?

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  10. Why are lyophillic colloidal sols are more stable than lyophobic collo...

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  11. Addition of Alum purifies water. Why?

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  12. What are the factors which influence the adsorption of a gas on a soli...

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  13. What are enzymes? Write a brief note on the mechanism of enzyme cataly...

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  14. What do you mean by activity and selectivity of catalyst?

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  15. Describe some feature of catalysis by Zeolites .

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  16. Give three uses of emulsions.

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  17. Why are solids rigid ?

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  18. Why is desorption important for a substance to act as good catalyst?

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  19. Comment on the statement : Colloid is not a substance but it is a stat...

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  20. Explain any one method for coagulation

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