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Mass Transfer

Mass Transfer
Liquid diffusivity is of the order of __________ cm² /second.

10-5 to 10-6
0.1
> 1
0.01

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

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

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Mass Transfer
Desirable value of absorption factor in an absorber is

< 1
0.5
1
> 1

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Mass Transfer
Mass transfer co-efficient 'K' according to penetration theory varies with mass dif-fusivity as

1/D
D1.5
D0.5
D

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Mass Transfer
The film penetration model of mass transfer was enunciated by

Fick
Toor and Marchello
Gilliland
Stefan

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Mass Transfer
The operating cost of a distillation column at minimum reflux ratio is

Maximum
Infinite
Minimum
Zero

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