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  • (a) Out of starch and ferric hydroxide sol, which one can easily be coagulated and why? (b) What is observed when an emulsion is centrifuged? (c) What is the role of promoters and poisons in catalysis?  

(a) Out of starch and ferric hydroxide sol, which one can easily be coagulated and why?

(b) What is observed when an emulsion is centrifuged?

(c) What is the role of promoters and poisons in catalysis?

 

 

 

 
 
 
 
 

Answers (1)

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(a) Fe(OH)_{3} can be easily coagulated them starch because it is a         hydrophobic sol, hence, the interaction between the dispersed phase and dispersion medium is weak whereas, starch is lyophilic so, it is very stable.

(b) When an emulsion is Centrifuged, demulsification takes place.

(c) Promoters increase the efficiency of catalyst whereas poison decreases the efficiency of a catalyst.

Posted by

Sumit Saini

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