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How will you prove the selective nature ...

How will you prove the selective nature of adsorption ?

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Activated charcoal adsorbs chlorine in preference to nitrogen and oxygen from the mixture of gases. Similarly, animal charcoal only adsorbs colouring matter from the solution of impure sugar. These examples show that adsorption is of selective nature.
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ICSE-SURFACE CHEMISTRY -EXERCISE (PART-II ( DESCRIPTIVE QUESTIONS )) (VERY SHORT ANSWER QUESTIONS)
  1. What is meant by positive and negative adsorptions?

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  2. Why activated charcoal is a better adsorbent than ordinary charcoal ?

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  3. How will you prove the selective nature of adsorption ?

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  4. How is adsorption of a gas related to its critical temperature?

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  5. Out of the following gases which will be adsorbed more readily on the ...

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  6. Why is ferric chloride preferred over potassium chloride in case of a ...

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  7. What happens when a colloidal sol of Fe(OH)3 is mixed with that of As2...

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  8. What happens when persistent dialysis of a colloidal solution is carri...

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  9. What happens when a beam of light is passed through As2S3 sol?

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  10. KCl is added to Fe(OH)3 sol?

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  11. What is the main cause of charge on a colloidal solution?

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  12. How are gold number and protective power of colloid related?

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  13. What is demulsification ?

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  14. Give four uses of emulsions.

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  15. What are micelles ? Give an example of a micellers system.

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  16. How does soap help in washing clothes?

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  17. What modification can you suggest in the Hardy-Schulze law?

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  18. Why is it essential to wash the precipitate with water before estimati...

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  19. Why lyophilic colloidal sols are more stable than lyophobic colloidal ...

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  20. How can a colloidal solution be distinguished from the true solution o...

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