A. Raising the temperature
B. Lowering the total pressure
C. Both A. and B.
D. Neither A. nor B.
Related Mcqs:
- In case of steam distillation, the steam leaving the liquid is not completely saturated with distillate vapour, because_______________?
A. Temperature is less
B. Total pressure is less
C. Mixing of steam with the material being vaporised is not so intimate as to result in equilibrium
condition
D. Saturated steam is used for steam distillation - In the layout plan for a vacuum distillation unit, operating at 60 mm Hg, supported by a barometric condenser, the appropriate place for the location of vacuum drum for collecting the distillate will be___________________?
A. At ground level
B. 2 metres above the ground
C. 5 metres above ground
D. 10 metres above ground - In the layout plan for a vacuum distillation unit, operating at 60 mm Hg, supported by a barometric condenser, the appropriate place for the location of vacuum drum for collecting the distillate will be_____________________?
A. At ground level
B. 2 metres above the ground
C. 5 metres above ground
D. 10 metres above ground - If the amount of the steam used in steam distillation is increased, the temperature of distillation__________________?
A. Increases
B. Decreases
C. Remains unchanged
D. Depends on relative volatility - A distillation column separates 10000 kg/hr of a benzene-toluene mixture as shown in the figure below: In the figure xF, xD and xW represent the weight fraction of benzene in the feed, distillate and residue respectively. The reflux ratio is_______________ ?
A. 0.5
B. 0.6
C. 1.0
D. 2.0 - For ethanol-water system, the lowering of distillate quality from 95% to 92% will cause ______________ plate requirement?
A. No change in theoretical
B. Marginal decrease in the number of
C. Major decrease in the number of
D. None of these - For ethanol-water system, the lowering of distillate quality from 95% to 92% will cause ____________________ plate requirement?
A. No change in theoretical
B. Marginal decrease in the number of
C. Major decrease in the number of
D. None of these - H2S is being absorbed in a gas absorber unit. The height of the transfer unit based on the overall mass transfer coefficient on the gas side is 0.4 m. The equilibrium data is given by, y = 1.5 x. The bulk concentration of H2S has to be reduced from 0.05 to 0.001 mole fraction in the gas side. The height of the tower (in meters) corresponding to an operating line given by, y = 5x + 0.001 is ______________________?
A. 2.0
B. 1.56
C. 1.0
D. 0.56 - The change in enthalpy, when a unit quantity of gas is absorbed by relatively large quantity of adsorbent (on which a definite concentration of the adsorbed gas already exists) is termed as the_________________?
A. Differential heat of adsorption
B. Heat of wetting
C. Integral heat of adsorption
D. None of these - Plate efficiency in a distillation column is reduced due to the ______________ of liquid?
A. Entrainment
B. Foaming
C. Weeping & dumping
D. All A., B. & C.
