CBSE Class 12-science Answered

Lyophillic colloids are medium loving e.g. gum, starch, rubber. Lyophillic colloids are reversible. If the medium in the colloid is water the colloid is called aqua sol/hydrosol and if the medium is alcohol it is called alcosol. Hydrophilic sols are stable can be prepared by shaking with medium that is water like gum, gelatin, starch, egg, albumen etc.
Lyophobic colloids are medium hating i.e. they cannot be converted into colloid easily they require an external agent to convert into colloid e.g. metal sulphides aluminium hydroxide. lyophobic colloids are irreversible.