Question 71. Mass transfer rate between two fluid phases does not necessarily depend on the __________ of the two phases.

Question 72. For ethanol-water system, the lowering of distillate quality from 95% to 92% will cause __________ plate requirement.

Question 73. The mass diffusivity, the thermal diffusivity and the eddy momentum diffusivity are same for, NPr = NSc = __________

Question 74. The interfacial area per unit volume of dispersion, in a gas-liquid contactor, for fractional hold up of gas = 0.1 and gas bubble diameter = 0.5 mm is given by (in m²/m³)

Question 75. The ratio of Murphree plate efficiency to point efficiency is 1 in a __________ flow model.

Question 76. Which of the following binary systems is an example of a maximum boiling azeotrope?

Question 77. In a liquid-liquid extraction, 10 kg of a solution containing 2 kg of solute C and 8 kg of solvent A is brought into contact with 10 kg of solvent B. Solvent A and B are completely immiscible in each other whereas solute C is soluble in both the solvents. The extraction process attains equilibrium. The equilibrium relationship between the two phases is Y* = 0.9X, where Y* is the kg of C/kg of B and X is kg of C/kg of A. Choose the correct answer.

Question 78. Capacity of a rotary dryer depends on its

Question 79. Removal of __________ exemplifies an adsorption unit operation.

Question 80. Pick out the wrong statement pertaining to the analogy between equations of heat and mass transfer operations.