$2.$Differential distillation is used for:

a$)$ Separating components with similar boiling points

b$)$ Separating components with large differences in boiling points

c$)$ Separating components in a single$-$stage process

d$)$ Separating components without vapor$-$liquid equilibrium

Which method is commonly used to analyze binary distillation systems graphically?

a$)$ McCabeThiele method

b$)$ Ponchon$-$Savarit method

c$)$ Fenske equation

d$)$ Underwood equation

Fenske equation is used to calculate:

a$)$ Total number of theoretical plates required for a distillation column

b$)$ Reflux ratio for a distillation column

c$)$ Minimum reflux ratio for a distillation column

d$)$ Optimum reflux ratio for a distillation column

The total reflux condition in distillation means:

a$)$ All the vapor leaving the top of the column is condensed and returned to the column

b$)$ None of the vapor leaving the top of the column is condensed and returned to the column

c$)$ Some of the vapor leaving the top of the column is condensed and returned to the column

d$)$ The bottom product is withdrawn at a constant rate