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(a) Give any three differences between P...

(a) Give any three differences between Physisorption and chemisorption
(b) (i) Mention the role of alum in the purification of drinking water.
(ii) Give an example of an oil dispersed in water emulsion. 

Text Solution

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(b)(i) It coagulates suspended impurities or It acts as a coagulant.
(ii) Milk or Vanishing cream.
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