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Less the gold number of a lyophilic coll...

Less the gold number of a lyophilic colloid, more is its protective power'- Justify.

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CHHAYA PUBLICATION-SURFACE CHEMISTRY-WARM UP EXERCISE
  1. Define the Electro-osmosis .

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  2. Give an example each of an sol exhibiting cataphoresis and anaphoresis...

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  3. What do you mean by isoelectric point of colloid ? Mention one importa...

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  4. Why is a medicine in colloidal state found to be very effective ?

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  5. Addition of an excess solution of AgNO(3), to a solution of KI gives a...

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  6. Particles of Fe(OH)(3), sol produced in the hydrolysis of FeCl(3), are...

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  7. Why are lyophilic sols more stable than lyophobic sols?

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  8. What are protective colloids? Give an example.

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  9. Less the gold number of a lyophilic colloid, more is its protective po...

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  10. What do you mean by coagulation of a colloid? Write the Hardy-Schulze ...

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  11. Na(2)SO(4) is more effective than NaCl in the coagulation of Fe(OH)(3)...

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  12. Which of the following is required in least amount for the coagulation...

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  13. On applying alum to cuts and wounds, bleeding stops. Explain.

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  14. Why is delta formed at the confluence of the river with sea ?

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  15. Why does the colour of sky appear blue ?

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  16. What makes nanomaterial so special ?

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  17. State three applications of nanoparticle ?

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  18. What are the dimensions of the Nanotubes .

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  19. What are the dimensions of the Quantum dots

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  20. What are the dimensions of the Nanofilms.

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