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Some statements are given below about ly...

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 

A

Both I and II are correct

B

Both II and III are correct

C

Both I and III are correct

D

All are correct

Text Solution

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The correct Answer is:
B
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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. [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

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

AAKASH SERIES-SURFACE CHEMISTRY-Objective Excersice - 1
  1. The process of separating a crystalloid, from a colloid by filtration,...

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  2. Which of the following type of molecules form micelles?

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  3. Colloidal solution of silver is prepared by

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  4. If gold number of A, B, C and D are 0.005, 0.05, 0.5 and 5 respectivel...

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  5. The concentration of electrolyte required to coagulate a given amount ...

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  6. The bleeding from a wound is stopped by the application of ferric chlo...

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  7. Colloidal solution commonly used in the treatment of eye disease is

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  8. Which one of the following is not a surfactant ?

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  9. The simplest way to check whether a system is colloidal

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  10. Particles of which of the following donot pass through ultra filter pa...

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  11. Some statements are given below about lyophillic sol I) These are so...

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  12. The tyndall effect in colloidal solutions is due to

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  13. Which of the following is a homogeneous system?

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  14. Colloidal systems are

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  15. The number of phases in a colloidal system is -

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  16. The following are some statements about micelles I) These are formed...

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  17. When dispersed phase is solid and dispersion medium is gas, the colloi...

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  18. Sulphur sol contains

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  19. Which one of the following statements is noy correct ?

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  20. Glid sol is not a

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