Mass Transfer
Critical humidity of a solid salt means the humidity

Above Which it will always become dry and below which it will always stay damp
Below which it will always stay dry
Above which it will always become damp
Both A and B

ANSWER DOWNLOAD EXAMIANS APP

Mass Transfer
Entrainer used in azeotropic distillation should

Form a new azeotrope of low relative volatility with one of the constituents of the mixture
Form a low boiling azeotrope with one of the constituents of the mixture
Have high latent heat of vaporisation
Have high viscosity to provide high tray efficiency

ANSWER DOWNLOAD EXAMIANS APP

Mass Transfer
Compound A is extracted from a solution of A + B into a pure solvent S. A Co-current unit is used for the liquid-liquid extraction. The inlet rate of the solution containing A is 200 moles of B/hr.m² and the solvent flow, rate is 400 moles of S/m². hr. The equilibrium data is represented by Y = 3X² , where Y is in moles of a A/moles of B and X is in moles A/moles of S. The maximum percentage extraction achieved in the unit is

0.5
0.9
0.25
0.7

ANSWER DOWNLOAD EXAMIANS APP