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Gold number of a lyophilic solution is s...

Gold number of a lyophilic solution is such property that

A

The larger its value, the greater is the peptising power

B

The lower its value, the greater is the peptising power

C

The lower its value, the greater is the protecting power

D

The lower its value, the greater is the protecting power

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The correct Answer is:
A
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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. 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. 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. [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

Some statements are given below about lyophillic sol I) These are solvent hating colloidal solutions II) These are very stable. III) All high molecular weight carbon compounds form in water, lyophillic sols. The correct combination is

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The sum of any two whole numbers is again a whole number. This property is called___

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AAKASH SERIES-SURFACE CHEMISTRY-Objective Excersice - 2
  1. As the size of gold particle increases the colour of solution varies a...

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  2. Which one of the following forms a negativity charged sol?

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  3. The order of coagulating power of PO(4)^(3-), SO(4)^(2-) and Cl^(-) in...

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

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  5. Peptization denots

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  6. The migration of colloidal solute particles in a colloidal solution, w...

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  7. Blue colour of the sky is due to

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  8. The order of coagulating power of PO(4)^(3-), SO(4)^(2-) and Cl^(-) in...

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  9. On adding AgNO(3) solution to KI solution, a negatively charged colloi...

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

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  11. Hardy - Schulz rules are based on of electrolyte ions coagulating the...

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  12. Which of the following is a kinetic property of sols ?

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  13. Brownian movement is mainly is due to

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  14. Which of the following is a non electrolytic colloidal sol

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  15. Sodium stearate forms associated colloids

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

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  17. Ferric chloride on rubbing to a bleeding wound causes

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  18. An example of a positively of a positively charged sol is

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  19. When the purc solvent diffuses out of the solution through the semi-pe...

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  20. If the gold number of potato starch is 25, how many grams of it is req...

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