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Mass Transfer

Mass Transfer
Desirable value of absorption factor in an absorber is

1
0.5
> 1
< 1

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Mass Transfer
The rough value of diffusion co-efficient of water vapor into air at 25°C may be about __________ cm²/sec.

1.25
0.25
0.0025
2.5

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Mass Transfer
Corresponding to Prandtl number in heat transfer, the dimensionless group in mass transfer is the __________ number.

Stanton
Schmidt
Sherwood
Peclet

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Mass Transfer
The suitable evaporator for concentration of foaming liquids is a __________ evaporator.

Vacuum
Long tube
Short tube
Falling film

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Mass Transfer
Binary distillation involves the mass transfer by __________ at the gas-liquid interface.

Unidirectional diffusion from liquid to gas phase
A counter diffusion at an almost equal molar rate
Unidirectional diffusion from gas to liquid phase
Either A or B

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Mass Transfer
Which of the following equipments is not used for gas dispersion?

Bubble cap tray towers
Agitated vessels
Perforated sieve tray towers
Spray towers

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