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Mass Transfer

Mass Transfer
The unit of volumetric diffusivity is

Cm²/seC₂
Cm/sec
Cm²/sec
Cm³/sec

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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 seives are porous

Synthetic zeolites crystals/metal alumino-silicates
Alumina
Silica
None of these

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Mass Transfer
__________ column is used in gas absorption process.

Bubble cap
Packed
Wetted wall
Seive/perforated tray

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Mass Transfer
Humidification involves mass transfer between a pure liquid phase and a fixed gas, which is

Non-ideal in nature
Soluble in the liquid
Insoluble in the liquid
At a fixed temperature

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Mass Transfer
Use of packed towers for distillation is generally limited to the

Multicomponent distillation
High pressure operation
Vacuum distillation
Small sizes

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