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a
A hydrophilic colloid is a colloid in which there is a strong attraction between the dispersed phase and water
b
A hydrophobic colloid is a colloid in which there is a lack of attraction between the dispersed phase and water
c
Hydrophobic sols are often formed when a solid crystallizes rapidly from a chemical reaction or a supersaturated solution
d
All of the above
answer is D.
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Detailed Solution
1) Hydro-(aqueous solvent) philic (loving) colloids have strong interactions with the disperson medium and colloids - True2) Hydro (aqueous solvent) phobic (hating) colloids have lack of attraction for solvents and are less stable - True3) Hydrophobic sols do not pass into colloidal sol readily. A solid crystallizes rapidly from a chemical reaction or a supersaturated solution, a hydrophobic sol is formed - True.