Question

Classify the following as lyophilic sols and lyophobic sols.
Gold Sol, starch Sol, gum Sol, ferric hydroxide Sol, Al(OH)3 sol

Answer 1

Answer:

Lyophilic Sol

Interaction more present

ex - Starch ; gum , glucose organic nature

Lyuphobic Sol

Interaction less

ex - Au . Ag Inorganic in nature

Answer 2

Let us see the nature of these sols :

Explanation:

Colloids

• They are formed when the solute dissolved in solvent is of size range 1nm-100nm .
• They have properties like :
• They scatter light .
• They appears to be homogeneous but actually are heterogeneous .
• They are quite stable .
• They can pass through normal filter paper but not through ultra filter paper .

They are of two types :

Lyophilic

Lyophobic

Lyophilic colloids

They are those in which dispersed phase and dispersion medium  has great affinity for each other .

Lyophobic colloids

They are those in which dispersed phase and dispersion medium   do not have attraction or  affinity for each other .

Out of the given options let us see the nature of these sols :

• Gold Sol - It is lyophobic
• starch Sol- It is Lyophilic
• gum Sol- It is lyophilic
• ferric hydroxide Sol-It is lyophobic
• Al(OH)3 sol- It is Lyophobic