Mass Transfer
Steady state equimolal counter diffusion occurs in case of

Binary phase distillation
Leaching
Liquid-liquid extraction
Absorption

ANSWER DOWNLOAD EXAMIANS APP

Mass Transfer
Flights in a rotary dryer are provided to

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

ANSWER DOWNLOAD EXAMIANS APP