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(I)Explain what is observed when (a) a...

(I)Explain what is observed when
(a) an emulsion is subjected to centrifugation
(b) direct current is passed through a colloidal sol
(ii) Write a chemical equation showing the preparation of a positive sol.

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### Step-by-Step Solution **(I) Observations when:** **(a) An emulsion is subjected to centrifugation:** 1. **Definition of Emulsion**: An emulsion is a mixture of two immiscible liquids where one liquid is dispersed in the other. Common examples include oil in water or water in oil. ...
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PRADEEP-SURFACE CHEMISTRY -CONCEPTUAL QUESTIONS
  1. Frequently, preparation of a colloid such as a protein can be made mor...

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  2. What causes Brownian movement in a colloidal solution?

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  3. Colloidal solution show Tyndall effect. Give two resasons.

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  4. How can a colloidal solution and true solution of the same collour be ...

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  5. Why is a collodial sol stable ?

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

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  7. A colloidal solution of AgI is prepared by two diffenent methods as ah...

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  8. Which one of the following electrolytes is most effective for the coag...

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  9. Out of BaCl(2) and KCl, which is more effective in causing coagulation...

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  10. What will happen if gelatin is added to a goal sol ?

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  11. What is the significance of reciprocal of "gold number"?

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  12. Give specific term to show the effect of the following processes: (a...

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  13. Match the paris (choose the correct answer from Section B for Section ...

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  14. The conductance of an emulsion increases on adding common salt. What t...

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  15. Gelatin is generally added to ice creams. Why?

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  16. Why artificial rain can be caused by throwing common salt on the cloud...

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

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  18. (I)Explain what is observed when (a) an emulsion is subjected to cen...

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  19. Give reasons for the following : (i) Peptizing agent is added to con...

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  20. (i)Why does leather get hardened after tanning ? (ii) On the basis o...

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