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The arsenious sulphide sol has negative ...

The arsenious sulphide sol has negative charge. The maximum coagulating power for precipitating it is of 

A

`0.1NZn(NO_(3))_(2)`

B

`0.1N Na_(3)PO_(4)`

C

`0.1NZnSO_(4)`

D

`0.1NAlCl_(3)`

Text Solution

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The correct Answer is:
D
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Coagultion is the process by which the dispersed phase of a colloid is made to aggregate and thereby separate from the continuous phase. The minimum concentration of an electrolyte in milli-moles per litre of the electrolyte solution which is required to cause the coagulation of colloidal sol is called coagulation value. Therefore higher is the coagulating power of effective ion, smaller will be the coagulation value. Coagulation value of the electrolyte alpha 1/("coagulating power") The coagualtion value of different electrolytes are different. This behaviour can be easily understood by hardy-schulze rule which states. "The greater is the valency of the effective ion greater is its precipitating power." As_2S_3 sol is negatively charged, capacity to precipitate it is highest in which ion ?

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AAKASH SERIES-SURFACE CHEMISTRY-PRACTICE EXERCISE
  1. Gelatin is often used as an ingredient in the manufacture of ice-cream...

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  2. The separation of colloidal particles (or purification of sol) from pa...

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  3. The arsenious sulphide sol has negative charge. The maximum coagulatin...

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  4. Which one of the followings is correctly matched ?

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  5. Which one of the following methods is commonly used for destruction of...

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  6. Gold numbers of protective colloids A,B, C and D are 0.50, 0.01, 0.10,...

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  7. The property of colloidal suspension used to determine the nature of c...

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  8. The diffusion of particles in colloid is

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  9. Butter is a colloid. It is formed when

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  10. When a colloidal solution is observed under an ultra microscope, we ca...

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  11. Which one of the following constitues irreversible colloidal system wi...

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  12. Which of the following forms cationic micelles above certain concentra...

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  13. Cod liver oil is

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  14. The colloidal system in which the disperse phase and dispersion medium...

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  15. Which of the following is characteristic of an oil in water type of em...

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  16. Which of the following is an example of zeolite

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  17. Soap removes grease by

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  18. Which of the following forms micelles in solutions of higher concentra...

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  19. The cleaning action of soap or detergent is due to

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  20. Which is not an example of coagulation

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