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Dear candidates you will find MCQ questions of Mass Transfer here. Learn these questions and prepare yourself for coming examinations and interviews. You can check the right answer of any question by clicking on any option or by clicking view answer button.

Q. 1) Mass transfer rate between two fluid phases does not necessarily depend on the __________ of the two phases.

(A) Interfacial area
(B) Degree of turbulence
(C) Physical properties
(D) Chemical properties
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Q. 2) 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
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Q. 3) The mass diffusivity, the thermal diffusivity and the eddy momentum diffusivity are same for, NPr = NSc = __________

(A) 0
(B) 0.5
(C) 1
(D) 10
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Q. 4) 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) 

(A) 500
(B) 800
(C) 900
(D) 1200
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Q. 5) The ratio of Murphree plate efficiency to point efficiency is 1 in a __________ flow model.

(A) Plug
(B) Perfectly mixed
(C) Both A & B
(D) Neither A nor B
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Q. 6) Which of the following is an undesirable property in a tower packing?

(A) Large surface per unit volume
(B) Large free cross-section
(C) Low weight per unit volume
(D) Large weight of liquid retained
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Q. 7) The most economical range of absorption factor is

(A) 0 to 0.5
(B) 0 to 3
(C) 1.25 to 2
(D) 5 to 15
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Q. 8) With increase in temperature, the leaching rate increases because of the

(A) Increased diffusivity
(B) Decreased viscosity of liquid
(C) Both A and B
(D) Neither A nor B
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Q. 9) Out of two equilibrium curves, first one lies above the diagonal and the second lies below the diagonal in the x-y plot. It means that separation by distillation is

(A) Not possible in the second case unless vacuum is applied
(B) Not possible in the second case unless high pressure is applied
(C) More readily done in the second case compared to first one
(D) None of these
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Q. 10) Leaching of coarse solid lumps is also termed as

(A) Decoction
(B) Dissolution
(C) Percolation
(D) Agitation and settling
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Explore Sets

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