Dilute solutions, over a small concentration range
Gaseous solutions at high pressure
Concentrated solutions
None of these
✅ The correct answer is option A.
Chemical Engineering MCQs
The absorption factor is defined as (where, L = liquid flow rate, G = gas flow rate and, m = slope of the equilibrium line)
L/mG
G/mL
ML/G
LG/m
✅ The correct answer is option A.
Absorption (liquid-gas system) with evolution of heat as compared to isothermal absorption results in
Decreased solute solubility
Large minimum liquid to gas (L/G) ratio
Large number of trays
All of the above
✅ The correct answer is option D.
The operating cost of a distillation column at minimum reflux ratio is
Minimum
Maximum
Infinite
Zero
✅ The correct answer is option A.
Schmidt number is given by
Μ/ρDAB
Re.Pe
Sh x Pe
Re/Pe
✅ The correct answer is option A.
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.)
Kc = Kp = Km
Kc = Kp/RT = Km . RT/P
Kc = Kp . RT = Km . RT/p
None of these
✅ The correct answer is option C.
Hydrogenation of oil is carried out in a/an __________ in Vanaspati manufacturing plant.
Agitated vessel
Sieve tray column
Bubble cap column
Packed tower
✅ The correct answer is option A.
The dew point of an unsaturated gas-vapor mixture does not depend upon the __________ of the mixture.
Composition
Temperature
Total pressure
All of the above
✅ The correct answer is option B.
The adiabatic saturation curve for a vapour-gas mixture is
Straight line
Slightly concave upward
Slightly concave downward
None of these
✅ The correct answer is option B.
Inside the distillation column, the
Driving force for the vapour flow is the pressure drop
Liquids are not always at their bubble points
Pressure increases gradually from bottom to the top of the column
None of these
✅ The correct answer is option A.