Question

Write one difference in each of the following:
(a) Multimolecular colloid and Associated colloid
(b) Coagulation and Peptization
(c) Homogeneous catalysis and Heterogeneous catalysis

Answer 1

(a) Multimolecular colloids:It consists of aggregates of a large number of atoms or smaller molecules. Its size is in the range of 1-1000nm.

Associated colloids:At low concentration, they act as strong electrolytes whereas at high concentrations form aggregates or micelles

(b) Peptization can be defined as dispersing the precipitate into colloidal particles whereas Coagulation can be defined as colloidal particles join to form large-sized particles.

(c) In a heterogeneous reaction, the catalyst is in a different phase from the reactants. In a homogeneous reaction, the catalyst is in the same phase as the reactants.