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(A)Lyophilic colloids are called as reve...

(A)Lyophilic colloids are called as reversible sols.
(R ) Lyophilic sols are liquid loving .

A

Both (A) and (R ) are true and (R ) is the correct explanation of (A)

B

Both (A) and (R ) are true and (R ) is not the correct explanation of (A)

C

(A) is true but (R ) is false

D

Both (A) and (R ) are false

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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

Lyophilic sols are more stable than lyophobic sols because

Lyophilic sols are more stable than lyophobic sols because

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

Select the properties which are for lyophilic colloidal sols

Which of the following is correct about lyophillic sol ?

The change of colloidal particles is responsible for the stability of sols. Explain.

AAKASH SERIES-SURFACE CHEMISTRY-Objective Excersice - 4 (ASSERTION (A)& REASON (R ) TYPE QUESTION)
  1. (A)A catalyst does not alter the equilibrium constant of a reaction ...

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  2. (A) NH(3) adsorbs more readily over activated charcoal than CO(2) (...

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  3. (A) : Gases between themselves cannot form a colloidal solution. (R)...

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  4. (A) Colloidal sols scatter light while true solutions do not. (R ) ...

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  5. (A) Colloidal particles show Brownian Movement (R ) Brownian movemen...

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  6. (A) A colloidal sol of As(2)S(3) is coagulated faster by 0.1 M BaCl(2)...

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  7. (A)Colloidal solutions are stable but colloidal particles do not sett...

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  8. (A) An emulsion becomes stable if saop is added to it. (R ) Saop c...

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  9. (A) Milk is an example of water in oil emulsions (R ) Emulsions con...

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  10. (A) Urease catalyses the hydrolysis of urea. (R ) All catalysts ar...

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  11. (A) Enzyme catalysed reactions are of first order. (R ) Enzyme ne...

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  12. (A)Adsorption is a surface phenomenon. (R ) During adsortion, residu...

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  13. (A) Conversion of fresh precipitate to colloidal state is called pept...

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  14. (A) Zeolites are good shape-selective catalysts (R ) Zeolites have ...

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  15. (A)Increase in surface area increases rate of evaporaton (R ) Str...

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  16. (A) Substances whose solutions cannot pass through filter paper are ca...

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  17. (A) In chemisorption , adsorption keeps on increasing with temperature...

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  18. (A)Lyophilic colloids are called as reversible sols. (R ) Lyophilic ...

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  19. (A)A colloidal sol of Fe(OH)(3) formed by peptisation carries positive...

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  20. (A) ZSM-5 is used as a catalyst is petrochemical industries . (R ) Z...

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