A. The slope of the stripping line is always less than unity

B. reases

C. For a given separation in a binary distillation column, with increase in reflux ratio (above the

D. imum reflux ratio), the fixed cost of the distillation column first increases and then

E. tifying operating lines are vertical at total reflux</strong>

F. Kremser-Brown-Souders equation is used to calculate the efficiency of a plate tower