Deaeration (removal of O2) of water is done by_________________?
A. Rectification
B. Absorption
C. Ion-exchange
D. Adsorption
Mass Transfer
For _______________ drying, the effects of velocity, temperature and humidity of the gas and the thickness of the solid are the same?
For _______________ drying, the effects of velocity, temperature and humidity of the gas and the thickness of the solid are the same?
A. Unsaturated surface
B. Constant rate
C. Both A. and B.
D. Neither A. nor B.
Rate of leaching increases with increasing______________________?
Rate of leaching increases with increasing______________________?
A. Temperature
B. Viscosity of solvent
C. Pressure
D. Size of the solid
The term “cooling range” in a cooling tower refers to the difference in the temperature of____________________?
The term “cooling range” in a cooling tower refers to the difference in the temperature of____________________?
A. Cold water leaving the tower and the wet bulb temperature of the surrounding air
B. Hot water entering the tower and the wet bulb temperature of the surrounding air
C. Hot water entering the tower and the cooled water leaving the tower
D. None of these
When the liquid over a plate is of uniform concentration, then ______________________?
When the liquid over a plate is of uniform concentration, then ______________________?
A. Murphree efficiency > point efficiency
B. Murphree efficiency < point efficiency
C. Murphree efficiency = point efficiency
D. Murphree efficiency ≠ point efficiency
The dimension of diffusivity is same as that of the__________________?
The dimension of diffusivity is same as that of the__________________?
The dimension of diffusivity is same as that of the
A. Density
B. Molal concentration
C. Kinematic viscosity
D. Velocity head
Diffusion in concentrated solutions differs from that in dilute solutions, because of the change in the _______________ with the concentration of the solution?
Diffusion in concentrated solutions differs from that in dilute solutions, because of the change in the _______________ with the concentration of the solution?
A. Degree of ideality
B. Viscosity
C. Both A & B
D. Neither A nor B
At minimum reflux ratio for a given separation__________________?
At minimum reflux ratio for a given separation__________________?
A. Number of plates is zero
B. Number of plates is infinity
C. Minimum number of the theoretical plates is required
D. Separation is most efficient
In the desorption of highly soluble gas from the liquid, the main resistance will be in the ______________ phase?
In the desorption of highly soluble gas from the liquid, the main resistance will be in the ______________ phase?
A. Gas
B. Liquid
C. Both A. & B.
D. Neither A. nor B.
Which of the following is the most suitable for extraction in a system having very low density difference ?
Which of the following is the most suitable for extraction in a system having very low density difference ?
A. Mixer-settler extractor
B. Centrifugal extractor
C. Pulsed extractor
D. Packed extraction tower