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For the coagulation of 100ml of a positi...

For the coagulation of 100ml of a positive sol 10ml of 1M sodium chloride is required. Calculate the flocculation value.

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For the coagulation of 100 ml of arsenious sulphide solution, 5ml of 1M NaCl is required. Calculated the flocculation value .

For the coagulation of 100ml of arsenious sulphide solution, 5ml of IM NaCl is required. Calculate the flocculation value.

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

For coagulation of 20ml of a negative sol Xml of 1M NaCl , Y ml of 1M BaCl_2 and Z ml of AlCl_3 are required separately . What is the correct order of X.Y and Z, values ?

For coagulation of 10ml of a positive sol, the volume of 1M each NaCl, Na_2SO_4, Na_3PO_4 and Na_4[Fe(CN)_(6)] required separately are P,Q, R and S ml respectively. Arrange P, Q , R and S in the descending order.

The mass of haemoglobin in mg required to protect from coagulation of 50 mL of a gold sol on adding 5 mL of 10 % NaCl solution is (gold number of haemoglobin = 0.03)

AAKASH SERIES-SURFACE CHEMISTRY-EXERCISE - 5.2
  1. Adsorption of a gas on the surface of solid is generally accompanied ...

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  2. How the distinguish between physisorption and chemisorption with the h...

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  3. For the coagulation of 100ml of a positive sol 10ml of 1M sodium chl...

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  4. How to distinguish lyophilic and lyophobic with tyndall effect?

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  5. What are for cationic and anionic surfactants ? Give examples.

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  6. Which property can be used to distinguish colloidal solutions and true...

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  7. Transition metals are efficient catalysis Substantiate

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  8. Colloids sulphur exhibits Brownian movement , while a solution in CS2 ...

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  9. What is peptisation ?

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  10. What is Helmholtz electrical double layer ?

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  11. The change of colloidal particles is responsible for the stability of ...

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  12. A negative change solution is obtained when Ferricchloride is added t...

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  13. Why the colour of gold sol change with the size of gold particles?

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  14. Write the characteristics and importance of bio-catalysis.

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  15. Rate of fruit fermentation increase with time why?

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  16. The decolourisation of permanganate with oxalate is initially slow, bu...

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  17. How the colloids are classified on the basis of type of particles in d...

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  18. Explain the purification of colloids by dialysis and ultrafiltration.

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  19. What is ultrafiltration ?

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  20. Arrange the following substances in order of increasing ability to coa...

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