Q.

Select the correct facts about lyophilic and lyophobic colloids.

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a

Lyophilic Lyophobic 
Reversible natureIrreversible nature

b

Lyophilic Lyophobic 
Extensive hydrationNo hydration 

c

Lyophilic Lyophobic 
Particles may migrate in either direction or do not migrate in an electric field.Particles migrate either 
cathode or anode 
in an electric field.

d

Lyophilic Lyophobic 
Stable due to charge and solvation. Stable due to their charges. 

answer is A, B, C, D.

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Detailed Solution

(1) On evaporation of the dispersion medium from lyophilic colloidal sol, residue again passes into colloidal state thus, they are of reversible nature while it is not in lyophobic colloidal sol and are thus irreversible-True

(2) True 
(3) True 

(4) True 

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