Mass Transfer
The reason for preferring packed towers over plate towers in distillation practice is that the packed tower operation gives

High pressure drop and low hold up
Low pressure drop and low hold up
Low pressure drop and high hold up
High pressure drop and high hold up

ANSWER DOWNLOAD EXAMIANS APP

Mass Transfer
The rate of solid-liquid extraction is limited by the

Phase change of the solute as it dissolves in the solvent
Diffusion of the solute through the solvent in the pores to the outside of the particle
All of these
Diffusion of the solute from the solution in contact with the particle to the main bulk of the solution

ANSWER DOWNLOAD EXAMIANS APP

Mass Transfer
Pick out the wrong statement pertaining to leaching.

Fine solids can not be leached in a Pachuka tank
Vegetable seeds can be leached in either of Bollman extractor, Rotocel or Kennedy extractor
Very high temperature is not needed for the leaching of sugar beet
Door classifier can be used for leaching of coarse solids

ANSWER DOWNLOAD EXAMIANS APP