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Mass Transfer

Mass Transfer
According to the film theory of mass transfer, the mass transfer co-efficient is proportional to (where, D = molecular diffusivity)

D2
D
D0.5
1/D

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Mass Transfer
Plate efficiency in a distillation column is reduced due to the __________ of liquid.

Foaming
Entrainment
All of these
Weeping & dumping

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Mass Transfer
Mass transfer co-efficient varies as DAB0.5, according to the __________ theory.

Surface renewal
Film
Penetration
None of these

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Mass Transfer
Which of the following provides maximum contact surface for a liquid-vapour system?

Packed tower
Seive-plate column
Bubble-cap plate column
Wetted wall column

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Mass Transfer
With increase in solvent rate, the number of transfer units, NtoG, for a fixed degree of absorption from a fixed amount of gas

Decreases linearly
Increases
Decreases
Remains same

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Mass Transfer
Dried finished product sampled from various parts of a __________ dryer exhibits non-uniformity in the moisture content.

Tray
Rotary
Freeze
None of these

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