Mass Transfer
Absorption factor method is used to calculate the number of ideal stages, when

Operating line lies below the equilibrium line
Both operating and equilibrium lines are parallel
Operating line lies above the equilibrium line
Pressure drop in the column is very high

ANSWER DOWNLOAD EXAMIANS APP

Mass Transfer
Flash distillation is

Most useful for handling binary systems
Same as differential distillation
Used for multicomponent systems like crude refining
Same as simple distillation

ANSWER DOWNLOAD EXAMIANS APP