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What is the role of diffusion in heterog...

What is the role of diffusion in heterogeneous catalyst?

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Diffusion of gas molecules occur at the surface of catalyst (solid) followed by adsorption. In the same way, the product formed diffuse from the surface of the catalyst leaving the surface free for more reactant molecules to get adsorbed and undergo reaction.
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NCERT EXEMPLAR ENGLISH-SURFACE CHEMISTRY-Short Answer Type Qrestions
  1. What causes Brownian motion in colloidal dispersion?

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  2. A colloid is formed by adding FeCl(3) in excess of hot water. What wil...

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  3. How do emulsifiers stabilise emulsion ? Name two emulsifiers.

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  4. Why are some medicines more effective in the colloidal form?

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  5. Why does leather get hardened after tanning?

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  6. How does the precipitation of colloidal smoke take place in Cottrell p...

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  7. How will you distiguish between dispersed phase and dispersion medium ...

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  8. On the basis of Hardy-schulze rule explain why the coagulating power o...

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  9. Why does bleeding stop by rubbing moist alum?

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  10. Why is Fe(OH)(3) colloid positively charged when prepared by adding Fe...

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  11. Why do physisorption and chermisorption behave differently with rise i...

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  12. What happens when dialysis is prolonged?

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  13. Why does the white precipitate of silver halide become coloured in the...

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  14. What is the role of activated charcoal in gas mask used in coal mines?

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  15. How does a delta form at the meeting place of sea and river water?

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  16. Given an example where physisorption changes to chemisorption with ris...

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

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  18. What is the role of diffusion in heterogeneous catalyst?

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  19. How does a solid catalyst enhance the rate of combination of gaseous ...

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  20. Do the vital functions of the body such as digestion get affected duri...

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