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What is the charge on the colloidal part...

What is the charge on the colloidal particles in the following : `As_2O_3` sol

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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 ultrafiltration ?

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 ?

What is the minimum diameter (in nm) of colloidal particles?

MODERN PUBLICATION-SURFACE CHEMISTRY-EXERCISE
  1. What is the charge on the colloidal particles in the following : As2O3...

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  2. True or False : Physical adsorption increases with rise in temperature...

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  3. True or False : Chemisorption is irreversible while physisorption is r...

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  4. True or False : Selectivity is the ability of a catalyst to direct the...

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  5. True or False : At low pressure, the extent of adsorption is directly ...

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  6. True or False : Al(NO3)3 has higher coagulating power than MgSO4 for F...

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  7. True or False : Gel is a system in which liquid is the dispersed phase...

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  8. the protective power of the lyophilic colloids es expressed in terms o...

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  9. True or False : Greater the flocculation value of an electrolyte, grea...

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  10. True or False : Adsorption is always multimolecular.

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  11. True or False : Colloidal sols are always heterogeneous.

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  12. Complete the missing links : Milk is an example of............. in ......

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  13. The phenomenon in which adsorption and absorption takes place simultan...

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  14. The nature of forces involved in physical adsorption are ................

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  15. The formation of micelles takes place above a particular temperature c...

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  16. The movement of colloidal particles under the influence of an electric...

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  17. The scattering of light by colloidal particles is called ........... .

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  18. The swelling of gel in water is called ............. .

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  19. ............. is the process of Separating the crystalloids from collo...

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  20. Colloidal solution of gold in water is called ............... .

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  21. In whipped cream, the dispersion medium is................ and dispers...

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