Question 4 A unit operation is a basic step in a process involving a physical or chemical transformation of a product. List two examples of unit operations for each of the physical principles listed in Table 4.1. Table 4.1: Physical principles and unit operations in agro-processing Physical Principle () Examples of Unit Operations Fluid flow 1) 2) Mass transfer 3) 4) Mechanical processes 5) 6 Thermodynamics 7) 8) Contact equilibrium 9) 10) Page 3 of 4