Q3. Classify the following:
(i) solutions as per their types:
Sodium amalgam hydrogen absorbed on Pd, lodine vapours in air.
Benzene in toluene, Carbon dioxide in water, Chloroform vapours
in Nitrogen,
(ii) colloids as per their types:
smoke, shaving cream, gemstones, Milk of magnesia, jelly,face cream.
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A colloid is a heterogeneous system in which one substance is dispersed (dispersed phase) as very fine particles in another substance called dispersion medium.
Colloidal particles are larger than simple molecules but small enough to remain suspended. Their range of diameters is between 1 and 1000 nm.
Colloidal particles have an enormous surface area per unit mass as a result of their small size.
We have to note that adsorption increases with increases in surface area.
Hence, the colloidal solution of palladium adsorb larger volume of hydrogen gas as the surface area of colloid will be more.
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