A. 1
B. ∞
C. 0.5
D. 2
Related Mcqs:
- Steady state equimolal counter diffusion is encountered in_____________________?
A. Separation of a binary mixture by distillation
B. Absorption of NH3 from air by water
C. All liquid-liquid diffusion systems
D. All liquid-solid diffusion systems - Steady state equimolal counter diffusion occurs in case of ____________________?
A. Leaching
B. Absorption
C. Binary phase distillation
D. Liquid-liquid extraction - The relation among various mass transfer co-efficients (M.T.C) for ideal gases is given by (where, Kc & Km are M.T.C. for equimolar counter diffusion with concentration & mole fraction respectively as the driving force. and, Kp= M.T.C. for diffusion of a gas through a stagnant inert gas with pressure as driving force) ?
A. Kc = Kp = Km
B. Kc = Kp/RT = Km . RT/P
C. Kc = Kp . RT = Km . RT/p
D. None of these - The value of NA/(NA + NB) for steady state molecular diffusion of gas ‘A’ through nondiffusing gas ‘B’ is____________________?
A. 1
B. ∞
C. 0.5
D. 2 - Ordinary diffusion process is also called ______________ diffusion?
A. Pressure
B. Thermal
C. Concentration
D. Forced - The rough value of diffusion co-efficient of water vapor into air at 25°C may be about ______________ cm2/sec?
A. 0.25
B. 2.5
C. 1.25
D. 0.0025 - Steady state temperature reached by a small amount of liquid evaporating into a large amount of unsaturated vapour-gas mixture is called the ________________ temperature?
A. Dry-bulb
B. Wet-bulb
C. Dew point
D. Adiabatic saturation - The partial pressure distribution of an ideal gas diffusing through another stagnant ideal gas at steady state follows a/an _________________ law?
A. Exponential
B. Parabolic
C. Linear
D. Cubic - A distillation column with N plates is being operated under normal conditions. At some point of time, the operation is shifted to total reflux condition (i.e., no product and residue are being withdrawn and feed to the column is stopped). At the new steady state ?
A. Composition of vapors and that of liquid do not vary throughout the column
B. Reboiler load and condenser load are minimum
C. The top and bottom compositions are unchanged with and without total reflux
D. The top and bottom compositions correspond to the maximum enrichment available - _____________ temperature is the steady state temperature attained by a small amount of liquid evaporating into a large quantity of unsaturated gas-vapor mixture ?
A. Dry bulb
B. Wet bulb
C. Dew point
D. None of these
