$4.$ Describe the difference between batch and continuous flow reactors in chemical engineering.

$5.$ What role does mass transfer play in absorption processes in chemical engineering?

$6.$ How does the choice of solvent affect the efficiency of an extraction process?

$7.$ Explain the principle behind chromatography and its applications in chemical engineering.

$8.$ What is the significance of heat integration in process design in chemical engineering?

$9.$ How do chemical engineers optimize reaction conditions to maximize yield and selectivity?

$10.$ Describe the operation and applications of a packed bed reactor in chemical engineering.