Mass Transfer
According to the Fenske equation, what will be the minimum number of plates required in a distillation column to separate an equimolar binary mixture of components A and B into an overhead fraction containing 99 mol% A and a bottom fraction containing 98 mol% B? Assume that relative volatility (αAB = 2) does not change appreciably in the coloumn.

8
12
6
10

ANSWER DOWNLOAD EXAMIANS APP

Mass Transfer
Flights in a rotary dryer are provided to

Lift and shower the solids thus exposing it thoroughly to the drying action of the gas
None of these
Increase the residence time of the solid
Reduce the residence time of solid

ANSWER DOWNLOAD EXAMIANS APP

Mass Transfer
Flash distillation is

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

ANSWER DOWNLOAD EXAMIANS APP
MORE MCQ ON Mass Transfer