Mass Transfer

A. Cellulose acetate membranes are used in dialysis process
B. Elutriation process refers to when the soluble material is largely concentrated on the surface of
an insoluble solid and is simply washed off by the solvent
C. ‘Cascade’ means a group of stages interconnected so that various streams flow from one to
another
D. Zirconia probe is used for the humidity measurement

A. The operating line always lies above the equilibrium solubility curve in case of a single
component absorber
B. The operating line always lies below the equilibrium solubility curve in case of a single
component stripper
C. The operating pressure in solvent extraction system should be below vapor pressures of all
components
D. The solubility of a particular gas in ideal solution in any solvent is always the same

A. Critical moisture content is not a property of the material itself
B. A sharp increase in pressure drop gives an indication of the flooding in a distillation column
C. Separation of components is not possible in liquid extraction, if selectivity is unity
D. Dehydration of ethyl alcohol is most economically done by molecular distillation at very high
vacuum

A. Diffusivity decreases with increase in temperature
B. Diffusivity increases with increase in molecular weight
C. Diffusivity increases with the size of the individual molecule
D. None of these

A. Increases
B. Decreases
C. Remains same
D. Either A. or B., depends on the system

A. Bone charcoal
B. Wood charcoal
C. Silica gel
D. Activated clay

A. High pressure drop
B. Maldistribution of liquid
C. Non-uniformity of packing
D. Both B. and C.

A. T1-Dew point temp; T2-Dry bulb temp; T3-Wet bulb temp
B. T1-Dew point temp; T2-Wet bulb temp; T3-Dry bulb temp
C. T1-Wet bulb temp; T2-Dry bulb temp; T3-Dew point temp
D. T1-Dry bulb temp; T2-Wet bulb temp; T3-Dew point temp

A. 1
B. > 1
C. < 1
D. 0.5

A. Sieve plate column
B. Bubble cap column
C. Randomly packed column
D. Wetted wall column