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Mass Transfer

Mass Transfer
Cox chart is useful in the design of

Crystalliser
Evaporator
Dryer
Distillation column

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Mass Transfer
Fractional solvent extraction

Employs only one solvent
Employs two solvents
Results in low interfacial tension
None of the listed here

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Mass Transfer
The vapour pressure exerted by the moisture contained in a wet solid depends upon the

Nature of the moisture
All of these
Temperature
Nature of the solid

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Mass Transfer
Danckwerts developed the __________ theory.

None of these
Film
Penetration
Surface renewal

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Mass Transfer
The value of NA/(NA + NB) for steady state molecular diffusion of gas 'A' through non-diffusing gas 'B' is

0.5
1
∞
2

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Mass Transfer
Occurrence of 'case hardening' during drying of a high moisture solid cake __________ the drying rate.

Increases
Does not affect
Exponentially increases
Decreases

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