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(a) Heat of adsorption is greater for ch...

(a) Heat of adsorption is greater for chemisorptions than physisorprion. Why ?
(b) What is collodin ?
(c ) Differentiate between peptisation and coagulation.

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Peptization is the process of converting a freshly prepared precipitate into collodial form by the the addition of a suitable electrolyte. The electrolytes used for the purpose are called peptizing agents. On the other hand, coagulation is the phenomenon of precipitation of a collodial solution by the addition of excess of an electrolyte.
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MODERN PUBLICATION-SURFACE CHEMISTRY-CONCEPTUAL QUESTION 2
  1. What is the significance of reciprocal of "gold number"?

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  2. 50 mL of standard gold solution needs 0.05 mg of gelatin for its prote...

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  3. 100mL of a colloidal solution is completely precipitated by addition o...

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  4. What is the charge on the colloidal particles in the following ? a. ...

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  5. Which of the following is the most effective electrolyte for the coagu...

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  6. Give reasons for the following : (i) Peptizing agent is added to con...

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  7. Give reasons for the following : (i) Peptizing agent is added to con...

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  8. Give reasons for the following : (i) Peptizing agent is added to con...

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  9. What is colloidion?

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  10. (a) Heat of adsorption is greater for chemisorptions than physisorprio...

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  11. Why is ferric chloride preferred over potassium chloride in case of a ...

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  12. Why does the sky appear blue on a clear day ?

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  13. A freshly formed precipitate of ferrie hydroxide can be converted to a...

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  14. Why does leather get hardened after tanning ?

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  15. Why is it necessary to remove CO when ammonia is obtained by Haber's p...

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  16. Why do we add alum to purify water ?

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  17. Out of MgCl2 and AICI3 which one is more effective in causing coagulat...

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  18. Out of sulphur sol and proteins, which one forms multimolecular colloi...

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  19. What are the dispersed phase and dispersion medium in milk

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  20. (a) Write the dispersed phase and dispersion medium of milk. (b) Wri...

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