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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)

μ²
μ
√μ
1/μ

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Mass Transfer
Molecular diffusivity of a liquid

Increases with temperature
May increase or decrease with temperature
Decreases with temperature
Is independent of temperature

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Mass Transfer
The-relative volatility for separation of a non-ideal binary mixture by distillation should be

> 1
1
< 1

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Mass Transfer
In case of __________ distillation, a solvent is added to alter the relative volatility of the mixture to be separated.

Extractive
Flash
Azeotropic
Molecular

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Mass Transfer
Minimum possible diameter of a packed coloumn is decided mainly by the

Gas viscosity
Flooding
Liquid hold up
Liquid density

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

Minimum
Zero
Maximum
Infinite

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