Category: Mass Transfer

A. P
B. 1/P
C. 1/√P
D. √P

A. Molecular velocity only
B. Pore radius of the catalyst only
C. Molecular mean free path only
D. Molecular velocity and pore radius of the catalyst

A. Kc = Kp = Km
B. Kc = Kp/RT = Km . RT/P
C. Kc = Kp . RT = Km . RT/p
D. None of these

A. Highest temperatures is near the feed plate
B. Driving force for the liquid flow is its weight
C. Vapors are not always at their dew points
D. All A., B. and C.

Pick out the wrong statement

A. Sherwood number in mass transfer is analogous to Nusselt number in heat transfer
B. Prandtl number in heat transfer is analogous to Schmidt number in mass transfer
C. Reynolds number in mass transfer is analogous to Grashoff number in heat transfer
D. Reynolds number remains the same in both heat and mass transfer

A. Gas
B. Liquid
C. Both A. & B.
D. Neither A. nor B.

A. Only one component
B. Two components
C. Any number of components
D. Only saturated liquid

A. For identical gas flow rates, less pressure drop occurs through a plate tower than through a
packed tower
B. Plate column can handle greater liquid loads without flooding than packed column, but the
liquid hold up is more in the case of plate column
C. For the same duty, plate columns weigh less than packed columns
D. All A., B. and C.

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. The product composition but not the fraction vaporised
B. The product composition as well as the fraction vaporised
C. The fraction vaporised but not the product composition
D. Neither the product composition nor the fraction vaporised