Mass Transfer

A. Vapour is in equilibrium with the liquid at the gas temperature
B. Vapour is in equilibrium with the liquid at the room temperature
C. Partial pressure of vapour equals the vapour pressure of the liquid at room temperature
D. None of these

A. Specific humidity
B. Partial pressure of vapour
C. Both A. and B.
D. Neither A. nor B.

A. Bubble the gas through liquid
B. Spray the liquid on gas stream
C. Either A. or B. would suffice
D. None of these

A. Parallel
B. Straight
C. Both parallel and straight
D. Neither parallel nor straight

A. Viscosity with concentration
B. Degree of ideality of the solution
C. Both A. and B.
D. Neither A. nor B.

A. Pressure
B. Temperature
C. Nature of the components
D. None of these

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. The ratio of number of ideal plates to actual plates
B. The ratio of number of actual plates to ideal plates
C. Same as the Murphree efficiency
D. Always more than the point efficiency

A. Low reflux ratio
B. Less number of trays
C. Small cross-section column
D. High reflux ratio

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