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Activity And Selectivity Of Catalysts...

Activity And Selectivity Of Catalysts

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(a) For answer section 10.
(b) For answer, consult section 10.
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The activity and selectivity of zeolites as catalyst is based on :-

Followin are the serms about ac itivty and selectivity: I. Acitivity is the ability of catalysts to accelerate chemical reactions and selectivity is the ability of catalysts to direct reaction to yield particular products. II. Activity is the ability of catalyst and selectivity is the ability of catalysts to accelerate chemical reactions. Select the correct term :

The temperature at which the catalystic activity of the catalysts is maximum ,is called

Assertion : In the presenced of promote, the activity on the surface of catalyst is enhanced. Reason : Promote increase the surface area of the catalyst and as a result, the number of active centres increase.

Mention one shape selective catalyst used to convert alcohol directly into gasoline .

What do you understand by shape selective catalysis? Why are zeolites good shape selective catalysts?

DINESH PUBLICATION-SURFACE CHEMISTRY -QUESTION FROM BOARD EXAMINATIONS
  1. Why is adsorption always exothermic ?

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  2. Explain what is observed when (i) Silver Nitrate solution is added t...

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  3. Activity And Selectivity Of Catalysts

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  4. Distinguish between the meaning of the terms adsorption and absorption...

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  5. What are emulsions ? What are their different types ? Give an example ...

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  6. The cause of Brownian-movement is

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  7. What is Tydall effect ? Discuss.

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  8. State Hardy schulze rule.

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  9. What are lyophilic and lyophobic sols?Give one example of each type ? ...

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  10. (a) What is enzyme catalysis ? Give an example. (b) What type of emu...

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  11. Give reasons for the following observations : (a) A deal is formed a...

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  12. Write a method by which lyophobic colloids can be coagulated.

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  13. Give reasons for the following observations : (a) Physisorption decr...

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  14. Out of BaCl(2) and KCl, which is more effective in causing coagulation...

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  15. Adsorption is always exothermic in nature , Do you agree ?

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  16. According to Hardy Schulze rule, the power of coagulation of an ion de...

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  17. What is sorption.

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  18. Why are powdered substance more effective adsorbent than their crystal...

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  19. Homogeneous And Heterogeneous Catalysis

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  20. Write the main reason for the stability of colloidal sols.

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