a. (i) Define coagulation.
    (ii) State Hardy-Schulze rule.
    (iii) What is electrophoresis?      

OR

 b. Write three differences between Chemisorption and Physisorption.

(i) The process in which the liquid gets converted to semi-solid state is called coagulation.
(ii) the greater valency of the flocculating ion is added, the greater its power to cause precipitation. This is Hardy-Schulz rule.
(iii) Electrophoresis is a separation method which is used to separate DNA, RNA or protein molecules based on their size and electric charge.

OR