Mass Transfer MCQs

At equilibrium the concentration of water in vapour phase (C^*) in kg/m³ of air space and the amount of water (m) adsorbed per kg of dry silica gel are related by, C^* = 0.0667 m. To maintain dry conditions in a room of air space 100 m³ containing 2.2 kg of water vapour initially, 10 kg of dry silica gel is kept in the room. The fraction of initial water remaining in the air space after a long time (during which the temperature is maintained constant) is

The value of $$\frac{{{{\text{N}}_{\text{A}}}}}{{{{\text{N}}_{\text{A}}} + {{\text{N}}_{\text{B}}}}},$$   for steady state molecular diffusion of gas 'A' through non-diffusing gas 'B' is

Large scale usage of flash distillation is practised in

Penetration theory states that the mass transfer co-coefficient is equal to (where, D_e is diffusivity and 't' is time)

Schmidt number is given by

Drying operation under vacuum is carried out to

Pick out the wrong statement.

An azeotropic mixture is a __________ mixture.

Drying of refractory is normally carried out in a __________ dryer.