Pick out the correct statement?
With increase in pressure, the relative volatility for a binary system__________?
Which of the following adsorbent is used in the refining of sugar?
Channelling in a packed tower results from the__________?
The following plot gives the saturated humidity (He) versus temperature (T).Line joining (H1, T1) and (H2, T2) is the constant enthalpy line. Choose the correct one from among the alternatives A, B, C and D__________?
In a binary system, separation is very efficient, when the relative volatility is__________?
Which of the following liquid-vapor contacting devices provides maximum contact surface area for a particular duty ?
Dryer widely used in a textile industry is __________ dryer?
Ponchon-Savarit method analyses the fractional equipment based on__________?
Minimum possible diameter of a packed column is decided mainly by the__________?
For the same process conditions, the reflux ratio of an unlagged distillation column__________?
A plait point is the point on the solubility curve, where the tie line reduces to a point. What is the number of plait point for a ternary system containing two pairs of partially miscible liquids ?
Entrainer used in Azeotropic distillation should__________?
Absorption factor method is used to calculate the number of ideal stages, when__________?
Which of the following same diameter columns gives lowest pressure drop per unit height ?
McCabe-Thiele method of binary distillation does not assume that the__________?
Which of the following mixtures does not form an azeotrope at atmospheric pressure ?
‘Absorption with chemical reaction’ is involved in the removal of__________?
Which of these columns incurs the lowest pressure drop ?
Extraction of penicillin employs a __________ extraction column?
When adsorption hysteresis is observed, the desorption equilibrium pressure is __________ that obtained by adsorption?
On addition of solute in the solvent, the __________ of the solution decreases ?
__________ column is the most suitable for achieving the best performance for mass transfer operations involving liquid with dispersed solids ?
Which of the following equipments is not used for gas dispersion ?
If xD = overhead product molal composition and RD = reflux ratio, then slope and intercept of the operating line for rectifying section are respectively ?
Hydrogenation of oil is carried out in a/an __________ in Vanaspati manufacturing plant?
Fenske equation determines the __________?
Schmidt number is given by __________?
__________ developed the film theory ?
Stacked packing compared to dumped packing__________?
A packed tower compared to a plate tower for a particular mass transfer operation__________?
Raoult’s law applies to the__________?
Which of the following is an undesirable property for an absorbing solvent ?
Langmuir equation is associated with__________?
Radioactive nuclear waste is treated in__________?
In case of an absorber, the operating __________?
For continuous drying of granular or crystalline material, the dryer used is the __________ dryer?
If mass diffusivity in a mixture is equal to the thermal diffusivity, then the Lewis number is__________
__________ is used as an ‘entrainer’ for the separation of acetic acid-water mixture by distillation?
Steady state equimolal counter diffusion occurs in case of __________?
In McCabe-Thiele method of theoretical plate calculation for a distillation column, the operating lines of stripping and rectifying sections coincide with the diagonal at __________ reflux ?
Equilibrium-moisture curves of different solids __________ ?
The vapour pressure exerted by the moisture contained in a wet solid depends upon the__________?
For turbulent mass transfer in pipes, the Sherwood number depends on the Reynolds number as__________?
With increase in solvent rate, the number of transfer units, NtoG, for a fixed degree of absorption from a fixed amount of gas__________?
At what value of reflux ratio, number of theoretical plates in a distillation column is minimum ?
The temperature to which a vapour gas mixture must be cooled (at varying humidity) to become saturated is called the __________ temperature?
The adiabatic saturation curve for a vapour-gas mixture is__________?
Flights in a rotary dryer are provided to__________?
Stefan’s law describes the mass transfer by__________?
Fenske equation for determining the minimum number of theoretical stages in distillation column holds good, when the__________?

Pick out the wrong statement?

A. Critical moisture content is not a property of the material itself
B. A sharp increase in pressure drop gives an indication of the flooding in a distillation column
C. Separation of components is not possible in liquid extraction, if selectivity is unity
D. Dehydration of ethyl alcohol is most economically done by molecular distillation at very high
vacuum

Correct Answer: D. Dehydration of ethyl alcohol is most economically done by molecular distillation at very high
vacuum ✔

Last Updated: February 18, 2019