Question

1. write the dispersed phase and dispersion medium of dust
2. why is Physiosorption whereas chemisorption is Irreversible ?
3. A colloidal solution is prepared by the method given in the figure what is the charge of agcl colloidal particle formed in the test tube ?​

Answer 1

Answer:

1. In dust the dispersed phase is solid particles and dispersion medium is air (gas).

2. Physiosorption occurs only because of physical attractive forces, like van der waals forces between molecules of adsorbate and adsorbent, hence that can be reversed on apllication of bigger forces but chemisorption occurs due to chemical reaction between molecules of adsorbate and adsorbent, and hence can't be reversed.

3. When KI solution is added to $AgNO_{3}$ a positively charged sol results due to adsoption of $Ag+$ ions from dispersion medium $-AgI/Ag+$ (positively charged).