Question
Chemistry Question on Surface Chemistry
A lyophobic colloid cannot be formed by
A
mixing dispersed phase and dispersion medium
B
chemical reactions like hydrolysis
C
exchange of solvent
D
peptisation.
Answer
mixing dispersed phase and dispersion medium
Explanation
Solution
In Lyophobic sols, substances like metals, their sulphides, etc., when simply mixed with the dispersion medium do not form the colloidal sol. These colloidal sols need a special method for their preparation. When the Dispersed phase and dispersion medium are mixed simply the colloidal sol can't be formed. Hence, they are called irreversbile sols.