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What are surfactants ?...

What are surfactants ?

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These are surface active agents. They lower the suface tension of water e.g., detergents.
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DINESH PUBLICATION-SURFACE CHEMISTRY -QUESTION FROM BOARD EXAMINATIONS
  1. Which of the following has minimum flocculation value :-

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  2. What is Milk of Magnesia? For what purpose, is it used ?

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  3. What are surfactants ?

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  4. What is iso-electric point of colloids ?

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  5. What is syneresis or weeping of gels ?

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  6. Explain why dose feeric hydroxide sol get coagulate on addition of sol...

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  7. Why does a beam of light on passing through a colloidal solution have ...

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  8. Milk is an emulsion of fat dispersed in Water. What stabiliser stabili...

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  9. Can the same substance act both as colloid and crystalloid ?

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  10. If a strong beam of light is passed through a colloidal sol place in a...

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  11. Why does clear sky appear blue ?

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  12. Why are lypolhilic colloids more stable than hybrobic colloids ?

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  13. Give one example each of multimolecular and macro-molecular colloids.

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  14. What happens when colloidal solution of fe(OH)(3) and As(2)S(3) are mi...

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  15. What happens when freshly precipitated ferric hydroxide is treated wit...

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  16. Why is pyophobis sol easily congulated as compared to lyophilic sol ?

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  17. Mention two ways by which lyophobic colloids can be coagulated.

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  18. What will happen when a small amount of NaCl solution is added to hydr...

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  19. Why does physisorption decrease with increase in temperature ?

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  20. A synthetic rubber which is resistant to the action of oils gasoline a...

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