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The process of separation of colloids by...

The process of separation of colloids by passing through semi- permeable membrane is called

A

Filtration

B

Electrophoresis

C

Dialysis

D

Ultrafiltration.

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Read the following passage and answer the questions. Ultrafiltration is the process of separating the colloidal particles from the solvent and soluble solutes present in the colloidal solution by specially prepared filters, which are permeable to all substances except the colloidal particles. Colloidal particles can pass through ordinary filter paper because the pores are too large. However, the pores of filter paper can be reduced in size by impregnating with collodion solution to stop the flow of colloidal particles. The usual collodion is a 4% solution of nitrocellulose in a mixture of alcohol and ether. An ultra-filter paper may be prepared by soaking the filter paper in a collodion solution, hardening by formaldehyde and then finally drying it. Thus, by using ultra-filter paper, the colloidal particles are separated from rest of the materials. Ultrafiltration is a slow process. To speed up the process, pressure or suction is applied. The colloidal particles left on the ultra-filter paper are then stirred with fresh dispersion medium (solvent) to get a pure colloidal solution. What is collodion ?

MODERN PUBLICATION-SURFACE CHEMISTRY-EXERCISE
  1. the electrical charge on a colloidal particle is indicated by :

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  2. The number of phases in a colloidal system is

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  3. The process of separation of colloids by passing through semi- permeab...

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  4. The size of colloidal particles is in the range of

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  5. An example of micelle is :

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  6. The average molecular mass of colloidal particles can be accurately de...

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  7. Which of the following is most effective electrolyte in causing the fl...

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  8. What are the components of coin metal alloy?

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  9. Which of the following electrolytes will be most effective in causing ...

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  10. Soaps essentially form a colloidal solution in water and remove the gr...

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  11. On addition of 1 mL solution of 10% NaCl to 10 mL gold sol in the pres...

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  12. Which of the following is an example of associated colloid ?

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  13. Alums purifty muddy water by:

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  14. What are the composition of Durelumine?

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  15. What is the composition of Hydroleum metal alloy?

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  16. When KI is added to silver nitrate solution, the sol formed may be wri...

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  17. Which of the following reaction gives a colloidal sol ?

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  18. For adsorption of a gas on a solid, the plot of log x/m vs log P is li...

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  19. Blue colour of water in sea is due to

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  20. Which of the following is not correct regarding the adsorption of a ga...

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