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Explain what will you observe when a b...

Explain what will you observe when
a beam of light is passed through a sol.

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Explain what is observed (i) when a beam of light is passed through a colloidal sol. (ii) an electrolyte, NaCI is added to hydrated ferric oxide sol. (iii) electric current is passed through a colloidal sol.

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PRADEEP-SURFACE CHEMISTRY -SHORT ANSWER QUESTIONS (III. COLLOIDS)
  1. Explain what will you observe when an electrolyte (NaCl) is added to...

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  2. Explain what will you observe when an electric current is passed thr...

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  3. Explain what will you observe when a beam of light is passed through...

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  4. What is zeta potential ? Explain briefly.

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  5. Define the following and give an example of each (a) Coagulation (b)...

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  6. Colloids have many characteristic properties : Among these, Tyndall ef...

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  7. Heat of adsorption is greater for chemisorption than physiorption. Why...

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  8. What is collodion ?

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  9. Differentiate between peptization and coagulation.

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  10. Explain the following with example : (a) Kraft temperature (b)Coagu...

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  11. What are protective colloids? How are the colloids stabilised? Explain...

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  12. What are emulsions ? Write two applications of emulsification.

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  13. What are emulsion ? How will you prepare a stable emulsion ? What are ...

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  14. Describe the cleaning action of soap.

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  15. What are the two classes of emulsions? Give one example of each class....

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  16. Mention two uses of each of colloids and emulsions.

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  17. Distinguish between true solution and colloidal solution of the same c...

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  18. How are the following sols in water prepared ? (i) Sulphur " "...

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  19. Explain why delta are formed where river and sea water meet.

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  20. Same substance can act both as colloid and crystalloid. (T/F)

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