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Mass Transfer

Mass Transfer
Pore size of the molecular seive 5A is __________ mm.

50
0.05
0.5
5

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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
1.24
1.04
0.54

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Mass Transfer
During sensible cooling process

Wet bulb temperature decreases
Relative humidity decreases
Both B and C
Relative humidity increases

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Mass Transfer
Components, having widely different boiling point in a binary mixture, can be separated using __________ distillation.

Steam
Molecular
Extractive
Simple

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Mass Transfer
At __________ reflux, theoretical number of plates in a distillation coloumn is calculated using Fenske-Underwood equation.

Maximum permissible
Minimum
Total
Operating

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Mass Transfer
In case of an unsaturated mixture of gas and vapor, the percentage saturation is __________ its relative saturation.

Equal to
Either A or B, depends on the mixture composition
Higher than
Lower than

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