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Explain why dose feeric hydroxide sol ge...

Explain why dose feeric hydroxide sol get coagulate on addition of solution of potassium sulphate ?

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The positively charged sol particles get their charge neutralised on coming in consult with hagatively charged `SO_(4)^(2-)` ions made available from `K_(2)SO_(4)` in solution. As a result, they get coagulated.
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Explain the following observation: a. A beam of light passing through a colloidal solution has a visible path. Passing an electric currenet through a colloidal solution removes colloidal particles from it. c. Ferric hydroxide sol coagulates on addition of potassium sulphate.

Convey the following information in the form of balanced chemical equations (i) An aqueous of ferrous sulphate reacts with an aqueous solution of sodium hydroxide to form precipitate of ferrous hydroxide and sodium sulphate remains in solution. (ii) Potassium metal reacts with water to give potassium hydroxide solution and hydrogen gas is evolved in the reaction. (iii) Solid potassium chlorate upon heating forms potassium chloride and liberates oxygen gas. (iv) An aqueous solution of aluminium chloride reacts with an aqueous solution of ammonium hydroxide solution to form aluminium hydroxide and ammonium chloride.

What are lyophilic and lyophobic colloidal? Which of these sols can be easily coagulated on the addition of small amount of electrolytes?

Out of Lyophilic and Lyophobic sols, which can be easily coagulated on the addition of a small amount of electroyte ?

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DINESH PUBLICATION-SURFACE CHEMISTRY -QUESTION FROM BOARD EXAMINATIONS
  1. What is iso-electric point of colloids ?

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  2. What is syneresis or weeping of gels ?

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

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

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

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

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

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  8. Why does clear sky appear blue ?

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

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

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

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

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

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

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

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  16. Why does physisorption decrease with increase in temperature ?

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  18. What is Tyndall Effect?

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  20. What is an emulsion ?

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