Write one similarity between Physisorption and Chemisorption?
(i) Physisorption and Chemisorption both are a surface phenomenon.
(ii) Physisorption and Chemisorption both increase with increase in surface area
(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?
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
(iii) An electrolyte (say NaCl) is added to ferric hydroxide solDefine the following terms:
i)Lyophilic colloid
ii) Zeta potential
iii) Associated colloids
Write one difference in each of the following :
Homogeneous catalysis and Heterogeneous catalysis