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The protective power of lyophilic sol is...

The protective power of lyophilic sol is

A

dependent on the size of colloidal particles

B

expressed in terms of gold number

C

expressed by x/m

D

directly proportional to the magnitude of charge on it

Text Solution

Verified by Experts

The correct Answer is:
B
It is expossed in terms of gold number (see Comprehensive Review.)
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In a colloidal state, the particle size of he dispersed phase ranges between 10^(3) to 10^(6) pm and the colloidal sol is of heterogeneous nature. Depending upon the ease with which these sols are formed, the colloidal sols are cassified as lyophilic and lyophobic. THe stability of a colloidal sol is due to the presence of charge on the sol particles and the neutralisation of the same is known as coagulation or precipitation. The coagulationg power of the active ions of he electrolytes can be compared with the help of Hardy-Schulze Law. The protecting power of the lyophilic sols can be compared with the help of gold number. Lesser the value of gold number, more will be the protecting power of the lyophilic sol. Lyophilic sols are more stable than lyophobic sols because

In a colloidal state, the particle size of he dispersed phase ranges between 10^(3) to 10^(6) pm and the colloidal sol is of heterogeneous nature. Depending upon the ease with which these sols are formed, the colloidal sols are cassified as lyophilic and lyophobic. THe stability of a colloidal sol is due to the presence of charge on the sol particles and the neutralisation of the same is known as coagulation or precipitation. The coagulationg power of the active ions of he electrolytes can be compared with the help of Hardy-Schulze Law. The protecting power of the lyophilic sols can be compared with the help of gold number. Lesser the value of gold number, more will be the protecting power of the lyophilic sol. The areseneous sulphide sol has negative (-) charge. The maximum power to precipitate it is of :

In a colloidal state, the particle size of he dispersed phase ranges between 10^(3) to 10^(6) pm and the colloidal sol is of heterogeneous nature. Depending upon the ease with which these sols are formed, the colloidal sols are cassified as lyophilic and lyophobic. THe stability of a colloidal sol is due to the presence of charge on the sol particles and the neutralisation of the same is known as coagulation or precipitation. The coagulationg power of the active ions of he electrolytes can be compared with the help of Hardy-Schulze Law. The protecting power of the lyophilic sols can be compared with the help of gold number. Lesser the value of gold number, more will be the protecting power of the lyophilic sol. 0.025 g of starch sol is required to prevent the coagulatio of 10 mL of gold sol when 1 mL of 10% NaCl solution is present. The gold number of strach sol is :

DINESH PUBLICATION-SURFACE CHEMISTRY-Colloidal state
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  2. The colloidal solution of two immiscible liquids is called

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  3. The protective power of lyophilic sol is

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  4. Which of the following method is not employed for the purification of ...

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  5. Which of the following statement is not correct in respect of hydrophi...

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  6. In which of the following colloidal systems the dispersion medium is s...

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  7. Which of the following indicates the charge on colloidal particles ?

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  8. The substances which readily form sol. when brought in contact with wa...

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  9. Clouds represent an example of dispersion of

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  10. The basic principle of cotterell precipitator is

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  11. The stability of the dispersed phase in a lyophobic colloids is due to

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  12. Colloidal particles of soap sol in water are

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  13. Arsenic sulphide sol is negatively charged. Which of the following ele...

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  14. Metals like silver and copper can be obtained in the colloidal state b...

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  15. In which of the following states, the particle size would be greater t...

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  16. The particle size range from……..in colloidal state

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  17. Which of the following processes can be used for the purification of c...

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  18. Gold number gives the indication of

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  19. In which of the following systems the dispersed phase and dispersion m...

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  20. The presence of colloidal particles of dust in air imparts blue colour...

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