GIVE REASONS FOR THE FOLLOWING
A) colloids stabilize due to brownian movement.
B) cottrell's smoke precipitator is fitted at the mouth of chimney used in factories.
C) colloidal gold is used for intramuscular injection
(a) Brownian movement is the random motion of the colloidal particles in a colloidal solution.
It counters the force of gravity acting on colloidal particles and hence helps in providing
stability to colloidal solutions by not allowing them to settle down.
(b) The precipitator contains plates having a charge opposite to that carried by smoke
particles which lose their charge and get precipitated and smoke is thus, free from harmful and toxic particles after passing through chimney.
(c) Because of larger surface area of colloidal gold which allows easy assimilation.