Q.1
In azeotropic mixture, the equilibrium vapour composition is
Q.2
When acetone is added in a two layer mixture of methyl isobutyl ketone and water at 30°C, the acetone distributes between the two layers and the composition of the layer follows two solubility curves. For this system,
Q.3
Henry's law states that the
Q.4
If the overall efficiency and Murphree plate efficiency are equal, then both the equilibrium and operating lines are
Q.5
Schimdt number and Lewis number for pure air at atmospheric conditions are respectively
Q.6
Nitrobenzene (boiling point = 210.6°C) is steam distilled at 1 atm pressure.Nitrobenzene will distill off __________ °C.
Q.7
Rate of leaching increases with increasing
Q.8
Azeotropism for ethyl alcohol-water system disappears by
Q.9
For a binary mixture distillation process, the degree of freedom is 2. However, if the pressure is fixed in this process, the number of independent variables in this process will be
Q.10
In case of absorption with exothermic reaction, for fluids having
Q.11
Pick out the correct statement.
Q.12
If a₁ and a₂ are the relative volatilities when the pressure in the distillation column is 1 and 2 atm respectively. Pick out the correct statement.
Q.13
Humidification involves mass transfer between a pure liquid phase and a fixed gas, which is
Q.14
The solvent used in liquid-liquid extraction should have __________ less than one.
Q.15
The relative humidity of air decreases in-spite of an increase in the absolute humidity, when the
Q.16
For the same feed, feed quality and separation (in a distillation column), with the increase of total pressure, the number of ideal plates will
Q.17
The feed to fractionating column is changed from saturated vapour to saturated liquid. If the separation and reflux ratio remains unchanged, the number of ideal stages will
Q.18
Antibiotics are best handled in a
Q.19
Solvent extraction is the terminology applied to the liquid-liquid extraction, which is preferred for the separation of the components of liquids, when
Q.20
With increase in the concentration of the adsorbate, the integral heat of adsorption
Q.21
Pick out the wrong statement.
Q.22
In a binary distillation column, if the feed contains 40 mole % vapour, the q line will have a slope of
Q.23
If the amount of the steam used in steam distillation is increased, the temperature of distillation
Q.24
Heat load in a cooling tower
Q.25
As the reflux ratio decreases, the
Q.26
For a binary mixture with low relative volatility, continuous rectification to get pure products will require
Q.27
Which of the following psychrometric processes is followed by water vapour laden unsaturated air, when it is passed through solid or liquid adsorbent?
Q.28
For contacting a highly soluble gas with a liquid
Q.29
As complete saturation of an adsorbent is approached, the differential heat of adsrop-tion approaches
Q.30
In case of physical adsorption, the difference between heat of adsorption and heat of normal condensation is
Q.31
In a binary system, separation is very efficient, when the relative volatility is
Q.32
Steam distillation is used for separation of high boiling
Q.33
Fractional solvent extraction
Q.34
Diameter to height ratio for a rashig ring is
Q.35
Large scale usage of flash distillation is practised in
Q.36
Batch tray dryers suffers from the disadvantage of
Q.37
Flash distillation is
Q.38
Flooding results in
Q.39
Ammonia present in the coke oven gas is removed by washing with
Q.40
The binary diffusivity in gases does not depend upon the
Q.41
According to the Fenske equation, what will be the minimum number of plates required in a distillation column to separate an equimolar binary mixture of components A and B into an overhead fraction containing 99 mol% A and a bottom fraction containing 98 mol% B? Assume that relative volatility (αAB = 2) does not change appreciably in the coloumn.
Q.42
Fenske equation determines the
Q.43
Mass transfer co-efficient is defined as
Q.44
Corresponding to Prandtl number in heat transfer, the dimensionless group in mass transfer is the __________ number.
Q.45
The expression, y(1 - x)/x(1 - y) is for
Q.46
The absorption factor is defined as (where, L = liquid flow rate, G = gas flow rate and, m = slope of the equilibrium line)
Q.47
__________ is the separation technique used for desalination of sea water.
Q.48
__________ extractor uses centrifugal force for separating the two phases.
Q.49
Schmidt number is given by
Q.50
Which of the following unit operations makes use of Thiele-Geddes equation?
0 h : 0 m : 1 s