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Lyophilic sols are more stable than lyop...

Lyophilic sols are more stable than lyophobic sols because

A

The colloidal particles have positive charge

B

The colloidal particles have negative charge

C

The colloidal particles are solvated

D

There are strong electrostatic repulsions between the negatively charged colloidal particles

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The correct Answer is:
C
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Following passage describes charcterstics of colloids. Answer the questions at the end of it. Lyophilic colloidal sols are much more stable than lyophobic colloidal sols. This is due to the extensive solvation of lyophilic colloidal sols, which forms a protective layer outside it and thus prevents it from forming associated colloids. Lyophillic colloidal sols also protect lyophobic colloidal sols from precipition by the action of electrolytes. This is due to formation of a protective layer by lyophilic sols outside lyophobic sols. Lyophilic colloidal sols are called protective sols. Gelatin (lyophilic) protects gold sol (lyophobic) from coagulaion on the addition of sodium chloride solution. Protective powers of different colloidal sols are measured in terms of 'gold number' (Zigmody). It is defined as the amount of protective sol in milligrams that prevents the coagulation of 10 mL of a given gold sol on adding 1 mL of 10 percent sodium chloride. Thus smaller the gold number of a lyophillic sol, the greater is the protective power. 0.025g of starch sol is required to prevent coagulation of 10ml gold sol when ImL of 10% Nacl solution is present. What is gold number of starch sol

Following passage describes charcterstics of colloids. Answer the questions at the end of it. Lyophilic colloidal sols are much more stable than lyophobic colloidal sols. This is due to the extensive solvation of lyophilic colloidal sols, which forms a protective layer outside it and thus prevents it from forming associated colloids. Lyophillic colloidal sols also protect lyophobic colloidal sols from precipition by the action of electrolytes. This is due to formation of a protective layer by lyophilic sols outside lyophobic sols. Lyophilic colloidal sols are called protective sols. Gelatin (lyophilic) protects gold sol (lyophobic) from coagulaion on the addition of sodium chloride solution. Protective powers of different colloidal sols are measured in terms of 'gold number' (Zigmody). It is defined as the amount of protective sol in milligrams that prevents the coagulation of 10 mL of a given gold sol on adding 1 mL of 10 percent sodium chloride. Thus smaller the gold number of a lyophillic sol, the greater is the protective power. Gold number of haemoglobin is 0.03. Hence, 10 mL of gold sol will require haemoglobin so that gold is not coagulated by ImL of 10% NaCl solution

Following passage describes charcterstics of colloids. Answer the questions at the end of it. Lyophilic colloidal sols are much more stable than lyophobic colloidal sols. This is due to the extensive solvation of lyophilic colloidal sols, which forms a protective layer outside it and thus prevents it from forming associated colloids. Lyophillic colloidal sols also protect lyophobic colloidal sols from precipition by the action of electrolytes. This is due to formation of a protective layer by lyophilic sols outside lyophobic sols. Lyophilic colloidal sols are called protective sols. Gelatin (lyophilic) protects gold sol (lyophobic) from coagulaion on the addition of sodium chloride solution. Protective powers of different colloidal sols are measured in terms of 'gold number' (Zigmody). It is defined as the amount of protective sol in milligrams that prevents the coagulation of 10 mL of a given gold sol on adding 1 mL of 10 percent sodium chloride. Thus smaller the gold number of a lyophillic sol, the greater is the protective power. [AgI]I^(-) collodial sol can be coagulated by the addition of a suitable cation. 1 mol of [Agl]I^(-) requires mol of AgNO_3, Pb(NO_3)_2 and Fe(NO_3)_3 as

Explain why lyophilic colloids are relatively more stable than lyophobic colloids ?

Give two examples of lyophobic sols.

Thallous chloride is more stable than thallic chloride because of

Thallous chlorie is more stable than thallic chloride because of

Thallous chloride is more stable than thallic chloride because of

Discuss how a lyophilic colloids protect a lyophobic colloids.

Why are hydrophobic sols easily coagulated ?

AAKASH SERIES-REVISION EXERCISE -SURFACE CHEMISTRY
  1. Which electrolyte is least effective in causing coagulation of +ve fer...

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  2. The capacity of an ion to coagulate a colloidal sol depends on

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  3. Lyophilic sols are more stable than lyophobic sols because

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  4. A liquid is found to scatter a beam of light but leaves no residance w...

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  5. Cellulose dispersed in ethanol is called

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  6. At CMC the surfactant molecules

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  7. Alum helps in purifying water by

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  8. On addiction of 1ml solution of 10% NaCl to 10ml gold sol in the prese...

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  9. Gelatin protects

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  10. The coagulation of colloidal particles of the sol can be caused by

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  11. Gelatin is used as an ingredient in the manufacture of icecreame for

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  12. Gold number is minimum in case of

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  13. Gold number of a lyophilic solution is such property that

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  14. In the coagulation of a positive sol, flocculation powers of CI^- , SO...

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  15. A colloidal solution is subjected to an electrical field. The particle...

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  16. Which is used for ending charge on colloidal solution

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  17. The coagulating power of an electrolyte for arsenious sulphide decreas...

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  18. Which of the following forms cationic micellus

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  19. 'Lock-key' fit theory is for

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  20. Which of the following is correct about lyophillic sol ?

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