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What happens when a colloidal sol of Fe(...

What happens when a colloidal sol of `Fe(OH)_3` is mixed with that of `As_2S_3`?

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`Fe(OH)_3` is a positively charged sol and `As_2S_3` is a negatively charged sol. On mixing, their charges get neutralized. Hence, their mutual coagulation occurs.
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ICSE-SURFACE CHEMISTRY -EXERCISE (PART-II ( DESCRIPTIVE QUESTIONS )) (VERY SHORT ANSWER QUESTIONS)
  1. Out of the following gases which will be adsorbed more readily on the ...

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

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

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

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

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

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

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

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  9. What is demulsification ?

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  10. Give four uses of emulsions.

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

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  12. How does soap help in washing clothes?

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

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

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

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

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  17. Colloidal solution can be made in water and in air as media. What dist...

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  18. Of NH3 and N2 which gas will be adsorbed more readily on the surface o...

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  19. What is the basic difference between adsorption and absorption.

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  20. What is meant by 'shape-selective catalysis' of reactions ?

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