Psychrometry deals with the properties of gas-vapor mixture. Humidity can be determined by the measurement of the __________ of a fibre ?
Which is the controlling factor for a drum drier ?
A minimum boiling azeotrope is exemplified by__________?
Relative volatility does not change appreciably with the change in__________?
Small dia distillation column can be a __________?
In a solution containing 0.30 Kg mole of solute and 600 kg of solvent, the molality is__________?
The wetted wall tower is used to determine__________?
Low viscosity absorbent is preferred for reasons of __________?
For absorbing a sparingly soluble gas in a liquid __________?
In distillation columns, the number of bubble caps per tray primarily depends upon the__________?
The reciprocal of stripping factor is termed as __________?
Mass transfer co-efficient of liquid is__________?
If f = moles of vapour present per mole of feed, then the slope of feed line is (McCabe- Thiele method) __________?
Which of the following plays an important role in problems of simultaneous heat and mass transfer ?
In paper industry, paper is dried in a __________ dryer ?
Relative humidity is the ratio of the__________?
As complete saturation of an adsorbent is approached, the differential heat of adsrop-tion approaches __________?
Which of the following solutions will follow Raoult’s law most closely ?
Mass transfer rate between two fluid phases does not necessarily depend on the __________ of the two phases?
In a counter-current liquid extractor__________?
On moving the feed line (q-line) from saturated liquid feed (vertical position) to saturated vapor feed (horizontal feed), if the slope of both the operating lines are to be increased, then it will result in__________?
Mass transfer co-efficient (K) and diffusivity D. are related according to film theory as__________?
The caking of crystals can be prevented by __________?
In distillation, overhead product contains __________?
Absorption accompanied with chemical reaction is exemplified by the absorption of__________?
Under conditions of flooding in packed tower, the gas pressure drop__________?
Absorption factor is defined as (where, S1 = slope of the operating line S2 = slope of the equilibrium curve) __________?
Detergent solution is dried to a powder in a __________?
For the case of flow of air past a wet bulb thermometer (air water vapour system), the approximate value of h2/ky.Cz is around__________?
To increase the absorption factor, (where, G = gas flow rate, S = solvent flow rate) __________?
In a forced draft cooling tower, water is cooled from 95 to 80°F by exposure to air with a wet bulb temperature of 70°F. In this case, the__________?
Which of the following equipments is not used in liquid-liquid extraction ?
When the __________ the relative humidity of air decreases, despite an increase in the absolute humidity?
A solid material shows case hardening properties while drying. Which of the following should be controlled to control the drying process ?
With increase in the concentration of the adsorbate, the integral heat of adsorption__________?
Air initially at 101. 3 kPa and 40°C and with a relative humidity of 50%, is cooled at constant pressure to 30°C. The cooled air has a__________?
An alkaline solution is used to reduce the concentration of carbon dioxide in a stream from 10% to 0.1% by absorption with irreversible chemical reaction. The overall number of transfer units based on gas phase is ?
__________ columns are used for liquid dispersion in a continuous gas phase ?
The efficiency of a plate column will be maximum, when the flow is ideal __________ the plate?
Separation of a mixture of two gases by absorption in the liquid solvent depends upon the difference in their__________?
Priming in a distillation column__________?
The amount of steam required per unit quantity of distillate in case of steam distillation will be reduced by __________?
The dew point of a saturated gas phase equals the __________ temperature?
The relative humidity of air decreases in-spite of an increase in the absolute humidity, when the__________?
Selectivity of the solvent used in solvent extraction should be)__________?
Nitrobenzene (boiling point = 210.6°C) is steam distilled at 1 atm pressure. Nitrobenzene will distil off __________ °C?
Molecular sieves are porous__________?
In liquid-liquid extraction, the number of phases at plait point is __________?
JD factor for mass transfer is a function of Reynolds number. Mass transfer by molecular diffusion from a single drop to surrounding still air is given by__________?
If the overall efficiency and Murphree plate efficiency are equal, then both the equilibrium and operating lines are__________?
Condensation of a vapour-gas mixture just begins, when (where, p = partial pressure of the vapour P = vapour pressure of the liquid) ?

Pick out the wrong statement ?

A. Reboiler is not used in open steam distillation
B. The separation of solutes of different molecular sizes in a liquid solution by use of a suitable
membrane is called dialysis
C. Freeze drying is used for the drying of fish
D. Fenske-Underwood equation is used for calculating theoretical number of plates in a
distillation column at normal operating reflux condition

Correct Answer: D. Fenske-Underwood equation is used for calculating theoretical number of plates in a
distillation column at normal operating reflux condition ✔

Last Updated: February 17, 2019