Write one difference in each of the following:
(a) Multimolecular colloid and associated colloid
(b) Coagulation and peptization
(c) Homogeneous catalysis and heterogeneous catalysis
OR
(a) Write the dispersed phase and dispersion medium of milk.
(b) Write one similarity between physisorption and chemisorption.
(c) Write the chemical method by which Fe(OH)3 sol is prepared from FeCl3.