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The presence of electric charge on collo...

The presence of electric charge on colloidal particles is indicated by the property, called :

A

dialysis

B

solubility

C

electrophoresis

D

osmosis

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The correct Answer is:
C
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Read the given passage and answer the question that follow: Colloidal particles always carry an electric charge which may be either positive or negative. For example, when AgNO_3 solution is added to KI solution, a negatively charged colloidal sol is obtained. The presence of equal and similar charges on colloidal particles provide stability to the colloidal sol and if, somehow, charge is removed. coagulation of sol occurs. Lyophobic sols are readily coagulated as compared to lyophilic sols. Why the presence of equal and similar charges on colloidal particles provide stability?

OP TANDON-THE COLLOIDAL STATE-Objective Questions
  1. An emulsifier is a substance which :

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  2. Gold number is associated with

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  3. Which one of the following is a false statement?

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  4. The presence of electric charge on colloidal particles is indicated by...

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  5. Which of the following properties are characteristic of lyophobic sols...

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  6. In a electrical field, the particles of a colloidal system move toward...

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  7. Cetyl trimethyl ammonium chloride is which type of detergent ?

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  8. The effective ion used in clarification of water is :

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  9. The number of moles of lead nitrate needed to coagulate 2 mole of coll...

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  10. Among the electrolytes Na, SO4 , CaCl4 , Al2(SO4)3 and NH4 Cl, the m...

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  11. A micelle formed during the cleansing aciton of soap is

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  12. The dispersed phase and dispersion medium in soap lather are respectiv...

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  13. Which one of the following is correctly matched?

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  14. Coagulation is not done by

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  15. The coagulating power of electrolytes having inos Na^(o+),Al^(3+) and ...

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  16. Which of the following is an anionic detergent ?

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  17. Sulphur sol contains :

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  18. The Tyndall effect is observed only when following conditions are sati...

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  19. Which of the following process is responsible for the formation of del...

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  20. Gold sol not a :

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