5.22 How are colloids classified on the basis of (i) Physical states of components (ii) Nature of dispersed phase and (iii) Interaction between dispersed phase and dispersion medium? 

<p><strong>5.22&nbsp;</strong></p><p>Colloidal solutions get classified in 8 Types on the basis of physical state of the dispersed phase and dispersion This are given in following table-</p><table><tbody><tr><td><p>Dispersed phase</p></td><td><p>Dispersion media</p></td><td><p>Types of colloids</p></td><td><p>Example</p></td></tr><tr><td width="144"><p>Solid</p></td><td width="147"><p>Solid Sol</p></td><td width="182"><p>Gem stone</p></td></tr><tr><td width="144"><p>Solid</p></td><td width="144"><p>Liquid</p></td><td width="147"><p>sol</p></td><td width="182"><p>Paints, cell fluid.</p></td></tr><tr><td width="144"><p>Solid</p></td><td width="144"><p>Gas</p></td><td width="147"><p>Aerosol</p></td><td width="182"><p>Dust, smoke.</p></td></tr></tbody></table><table><tbody><tr><td width="144"><p>Liquid</p></td><td width="144"><p>Solid</p></td><td width="147"><p>Gel</p></td><td width="182"><p>Butter, Cheese.</p></td></tr><tr><td width="144"><p>Liquid</p></td><td width="147"><p>Emulsion</p></td><td width="182"><p>Milk, Hair cream.</p></td></tr><tr><td width="144"><p>Liquid</p></td><td width="144"><p>Gas</p></td><td width="147"><p>Aerosol</p></td><td width="182"><p>Fog, Mist, Cloud.</p></td></tr><tr><td width="144"><p>Gas</p></td><td width="144"><p>Solid</p></td><td width="147"><p>Solid Sol</p></td><td width="182"><p>Pumice stone.</p></td></tr><tr><td width="144"><p>Gas</p></td><td width="144"><p>Liquid</p></td><td width="147"><p>Foam</p></td><td width="182"><p>Froth, soap lather.</p></td></tr></tbody></table><p><strong>2) </strong>Depending upon nature of Particles of dispersed phase it can be classified into 3 categories</p><p>Multimolecular Colloids-In this colloidal particle consist of aggregates of atoms having diameter less than</p><p>Macromolecular colloids-The colloids in which Large particle aggregates and dissolved into suitable</p><p>Associated colloids – This colloids show Colloidal property at higher This contains ions of colloidal size.</p><p><strong>3) </strong>Depending upon interactions between dispersed phase and dispersion medium it is divided into 2 categories</p><p>Lyophilic Colloids- lyophilic (liquid loving) this colloids formed by direct mixing of substances like gum starch etc. with suitable liquid, called as lyophilic sols . This are called as reversible Colloids because if dispersion medium is separated from the dispersed phase it can be reconstructed just by mixing This sols are quite stable. Ex-Protein, Starch.</p><p>Lyophobic colloids- lyophobic (liquid hating) this Colloids don't formed by direct mixing of dispersed phase and dispersion media they require special methods for Ex-Sols of metal sulphid</p>

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