1.

(a) What are lyophilic and lyophobic sols ? Give one example for each. (b) What is Tyndall effect ?

Answer»

SOLUTION :(a) Lyophilic sol : has affinity towards DISPERSION medium
Example : Starch sol, albumin sol, gelatin, glue.
Lyophobic sol : Has no (or LITTLE) affinity towards dispersion medium.
Example : Sulphur sol, Metal sol, Metal oxide sol, slophide sols.
(B) Scattering of light by COLLOIDAL particles.


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