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The ability of the protective colloid is...

The ability of the protective colloid is measured in terms of……………….

A

gold number

B

flocculation number

C

valence of counter ion

D

Tyndall effect.

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the protective power of the lyophilic colloids es expressed in terms of gold number, a term introduced by Zsigmondy. Gold number is the number of milli - gram of the protective colloid which prevent the coagulation of 10 mLof red gold sol , when 1 mL of a 10 per cent solution of sodium chloride is added to it . thus smaller the gold number of lyophillic colloid, the greater is the protective power. gold number given an indication of

MODERN PUBLICATION-SURFACE CHEMISTRY-REVISION EXERCISE (OBJECTIVE QUESTIONS) (MULTIPLE CHOICE QUESTIONS)
  1. The emulsifying agent in milk is

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  2. Clouds represent an example of dispersion of

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  3. which of the following is a lyophobic colloid ?

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  4. At high concentration of soap in water, soap behaves as …… .

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  5. The ability of the protective colloid is measured in terms of……………….

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  6. The function of enzymes in the living system is to

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  7. The ultrafiltration process of purification of colloidal solutions is ...

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  8. In physical adsorption, the forces associated are :

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  9. The colloidal system of a solid dispersed in liquid medium is :

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  10. Which of the following has minimum gold number ?

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  11. Which of the following is not a favourable condition for physical adso...

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  12. Which property of colloids is not dependent on the change on colloidal...

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  13. Tyndall effect is observed when:

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  14. In the coagulation of solution As, S, which has maximum coagulating va...

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  15. Which one of the following will have the highest coagulating power for...

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  16. Match the type of colloidal system (column I) with its example (column...

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  17. Match the type of colloidal system (column I) with its example (column...

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  18. Match the type of colloid (column I) with its property (column II)

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  19. Match the sol (column I) with its charge (column II)

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  20. Match the phenomenon (column I) with its significance (column II)

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