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The mass diffusivity, the thermal diffusivity and the eddy momentum diffusivity are same for, NPr = NSc = _________________?
Related MCQs
The diffusivity D. in a binary gas mixture is related to the temperature (T) as__________?
The change in enthalpy per unit weight of adsorbed gas when adsorbed on gas free or “outgassed” adsorbent to from a definite concentration of adsorbate is called its__________?
An Azeotropic mixture is a __________ mixture?
Inside the distillation columns, the __________?
Total reflux in a distillation operation requires minimum__________?
Boiling point diagram is not affected by the ambient__________?
Dry bulb temperature of unsaturated air is more than its __________ temperature?
Inside the distillation column, the__________?
A mixture of 10% C6H6 vapour in air at 25°C and 750 mm Hg has a dew point of 20°C. Its dew point at 30°C and 700 mm Hg will be around __________ °C?
Chemisorption (chemical adsorption) is__________?
The absorption factor is defined as (where, L = liquid flow rate, G = gas flow rate and, m = slope of the equilibrium line) ?
When the feed to a distillation column is a saturated liquid, slope of the feed line is__________?
Fenske-Underwood equation used for calculating the minimum number of theoretical plates in distillation column is valid for__________?
Solvent used in extractive distillation__________?
As the reflux ratio in a distillation column is increased from the minimum, the__________?
Make up water is supplied during cooling tower operation to compensate for water losses due to__________?
An ideal tower packing should not __________?
Positive deviation from Raoult’s law means a mixture whose total pressure is__________?
(NSh/NRe.NSc) is termed in mass transfer operation as the __________?
The operating line for an absorber is curved, when plotted in terms of __________?
One mole feed of a binary mixture of a given composition is flash vaporised at a fixed P and T. If Raoult’s law is obeyed, then changing the feed composition would effect ?
The rate of solid-liquid extraction is limited by the__________?
The rate of mass transfer is not dependent upon the__________?
Gaseous diffusion co-efficient increases with increase in the__________?
In case of steam distillation, the steam leaving the liquid is not completely saturated with distillate vapour, because__________?
__________ temperature is the steady state temperature attained by a small amount of liquid evaporating into a large quantity of unsaturated gas-vapor mixture ?
Heat load in a cooling tower__________?
A good solvent used for absorption should not have very high__________?
Dew point of a gas-vapour mixture__________?
Deaeration (removal of O2) of water is done by__________?
For __________ drying, the effects of velocity, temperature and humidity of the gas and the thickness of the solid are the same?
Rate of leaching increases with increasing__________?
The term “cooling range” in a cooling tower refers to the difference in the temperature of__________?
When the liquid over a plate is of uniform concentration, then __________?
The dimension of diffusivity is same as that of the__________?
Diffusion in concentrated solutions differs from that in dilute solutions, because of the change in the __________ with the concentration of the solution?
At minimum reflux ratio for a given separation__________?
In the desorption of highly soluble gas from the liquid, the main resistance will be in the __________ phase?
Which of the following is the most suitable for extraction in a system having very low density difference ?
What is the reflux ratio at total reflux ?
In case of gases, the binary diffusivity is proportional to (where, P = pressure) ?
Air at a particular humidity is heated in a furnace. The new dew point__________?
Sides of equilateral-triangular co-ordinates (on which ternary liquid system is plotted) represent __________?
Which of the following unit operations makes use of Thiele-Geddes equation ?
The-relative volatility for separation of a non-ideal binary mixture by distillation should be __________?
If moisture content of solid on dry basis is X, then the same on wet basis is__________?
For the air water system under ambient conditions, the adiabatic saturation temperature and the wet bulb temperature are nearly equal, because__________?
In continuous distillation, the internal reflux ratio (Ri) and the external reflux ratio (Re) are related as__________?
Separation of two or more components of a liquid solution cannot be achieved by__________?
Solvent extraction is the terminology applied to the liquid-liquid extraction, which is preferred for the separation of the components of liquids, when__________?
If the amount of the steam used in steam distillation is increased, the temperature of distillation__________?
The mass diffusivity, the thermal diffusivity and the eddy momentum diffusivity are same for, NPr = NSc = _________________?
A. 1
B. 0.5
C. 10
D. 0
Correct Answer:
1
✔
Last Updated:
February 18, 2019