Write three distinct features of chemisorptions which are not found in physisorptions.

Write the main reason for the stability of colloidal sols.

(i) Differentiate between adsorbtion and absorption.

(ii)Out of MgCl2 and AlCl3, which one is more effective in causing coagulation of negatively charged sol and why?

(iii)Out of sulphur sol and proteins, which one form multimolecular colloids?

What is the reason fo the stability of colloidal sols ?

Define the following terms:
i)Lyophilic colloid
ii) Zeta potential
iii) Associated colloids

Classify colloids where the dispersion medium is water. State their characteristics and write an example of each of these classes.

OR

Explain what is observed when

(i) An electric current is passed through a sol

(ii) A beam of light is passed through a sol

What are emulsions? What are their different types? Give one example of each type.

Write one similarity between Physisorption and Chemisorption?

Write one difference in each of the following :
Lyophobic sol and Lyophilic sol

Write one difference in each of the following :
Homogeneous catalysis and Heterogeneous catalysis