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Explain the following terms with suitabl...

Explain the following terms with suitable examples (i) Alcosol (ii) Aersol and (iii) Hydrosol

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(i) Alcosol. It is a colloidal dispersion having alcohol as the dispersion medium, e.g., collodion (a colloidal sol of cellulose nitrate in ethyll alcohol). (ii) Aerosol. It is a colloidal dispersion of a liquid in a gas, e,g., fog. (iii) Hydrosl. It is a colloidal sol of a solid in water as the dispersion medium, e.g., starch sol or gold sol.
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PRADEEP-SURFACE CHEMISTRY -NCERT (EXERCISES)
  1. Why is adsorption always exothermic ?

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  2. How are the colloidal solutions classified on the the basis of physica...

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  3. Disuss the effect of pressure and temperature on the adsorption of gas...

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

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  5. What is the difference between multimolecular and macromolecular colli...

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  6. What are enzymes ? Write in brief the mechanism of enzyme catalysis ?

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  7. How are colloid classified on the basis of: ltbtgt (a) physical state ...

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  8. Explain what is observed (i) when a beam of light is passed through ...

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

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  10. What is demulsification ? Name two demulsifiers.

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  11. Action of soap is due to emulsification and micelle formation. Comment...

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  12. Give four examples of heterogeneous catalysis.

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  13. What do you mean by activity and selectivity of catalysts ?

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  14. Descirbe some features of catalysis by zeolites.

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  15. What is shape - selective catalysis ?

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  16. Explain the following terms : {:(a. El etropho resis , b. Coagulati...

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  17. Give four uses of emulsion.

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  18. What are micelles ? Give an example of a micelle system.

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  19. Explain the following terms with suitable examples (i) Alcosol (ii) Ae...

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  20. Comment on the statement that " colloid is not a substance but state ...

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