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The average molecular mass of colloidal ...

The average molecular mass of colloidal particles can be accurately determined by

A

Measurement of osmotic pressure

B

Tyndall effect

C

Brownian movement

D

Flocculation value.

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Read the given passage and answers following questions : The particles of colloidal solution possess electrical charge which is responsible for the stability of these solutions. The charge on colloidal particles arises because of selective adsorption of ions which are common with their own lattice. The presence of charge on colloidal particles can be determined with the help of phenomenon known as electrophoresis. However, when some electrolyte is added, the charge on the particles of, dispersed phase gets neutralized and precipitation takes place. This process is also called coagulation. The coagulation is given by Hardy Schulze rules. According to these rules the ions carrying the charge opposite to that of sol particles are effective and coagulating power of an electrolyte is directly proportional to the fourth power of the valency of the ion. Coagulation can also occur by mutual precipitation , by electrophoresis, by persistent dialysis or by heating or cooling. Answer the following questions : Name the other ways by which coagulation can occur.

MODERN PUBLICATION-SURFACE CHEMISTRY-EXERCISE
  1. The size of colloidal particles is in the range of

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  2. An example of micelle is :

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

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

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  5. What are the components of coin metal alloy?

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

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

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

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

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  10. Alums purifty muddy water by:

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  11. What are the composition of Durelumine?

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  12. What is the composition of Hydroleum metal alloy?

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

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

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

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  16. Blue colour of water in sea is due to

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

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  18. Alum helps in purifying water by

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  19. According to adsorption theory of catalysis, the speed of the reaction...

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  20. Which of the following characteristic is not correct for physical adso...

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