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Mass Transfer

Mass Transfer
Absorption factor, for a fixed degree of absorption from a fixed amount of gas should be

≤ 1
< 1
> 1
1

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Mass Transfer
Bound moisture is that liquid which exerts an equilibrium vapor pressure __________ that of the pure liquid at the given temperature.

Equal to
Either A or B; depends on the solid
More than
Less than

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Mass Transfer
Ammonia present in the coke oven gas is removed by washing with

Caustic solution
Dilute ammoniacal liquor
Ethanolamine
Dilute HCl

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Mass Transfer
In gas-liquid contact operation, the number of ideal stages, N = (xa - xb)/(xb - x*b) . This is true when the stripping factor 'S' is

S = ∞
S < 1
S = 1
S > 1

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Mass Transfer
A pure drug is administered as a sphere and as a cube. The amount of drug is the same in the two tablets. Assuming that the shape and size do not influence the mass transfer, the ratio of rate of dissolution in water at t = 0 for the cubic to spherical tablet is

1.94
1.04
1.24
0.54

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Mass Transfer
_______ number indicates the ratio of the rates of the heat and mass transfer incase of a cooling tower.

Stanton
Peclet
Sherwood
Lewis

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