(a) How can we get the following colloidal solutions:
(i) Silver in water
(ii) Fe in water
(b) List two applications of adsorption.
(a) (i) Silver in water: Colloidal sol of Ag in water (Reduction with dil Sn(
(ii) in water: (By boiling with their chlorides):
(b) Applications of adsorption:
(i) All gas purifier devices contain suitable adsorbent so that poisonous
gases present in the atmosphere are adsorbed and the air for
breathing is purified.
(ii) Sugar is decolourized by treating sugar solution with charcoal
powder which adsorbs the undesirable colours present.