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Mass Transfer

Mass Transfer
According to Poiseuille's law, the permeability for gas flow through a capillary is proportional to (where, μ = gas viscosity)

1/μ
√μ
μ²
μ

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Mass Transfer
Which of the following is not fixed by the process requirements, in the design of absorbers?

Flow rate of the entering gas
Composition of the entering liquid
Terminal concentrations of gas stream
None of these

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Mass Transfer
Pick out the system with maximum boiling azeotrope at 1 atm.

Ethyl alcohol-water
Acetone chloroform
None of these
Benzene-ethyl alcohol

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Mass Transfer
For a binary mixture with low relative volatility, continuous rectification to get pure products will require

Small cross-section column
High reflux ratio
Less number of trays
Low reflux ratio

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

D0.5
D
D1.5
1/D

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Mass Transfer
Dorr thickener is an equipment used for

Clarification
Classification
Leaching
Sedimentation

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