a. (i) Define coagulation.
(ii) State Hardy-Schulze rule.
(iii) What is electrophoresis?
OR
b. Write three differences between Chemisorption and Physisorption.

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Detailed Solution

(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.

Chemisorption	Physisorption
1. It arises due to chemical bond formation.	It arises due to van der Waal’s forces.
2. It is irreversible.	It is reversible.
3. It is highly specific in nature.	It is not specific in nature.

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