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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
1/μ
√μ
μ

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Mass Transfer
At what value of reflux ratio, number of theoretical plates in a distillation column is minimum?

< 1
1
∞

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Mass Transfer
In case of physical adsorption, the difference between heat of adsorption and heat of normal condensation is

Zero
Called integral heat of adsorption
Equal to the heat of formation of surface compound
Equal to the heat of wetting

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Mass Transfer
Which of the following remains constant during sensible cooling process ?

None of the listed here
Partial pressure of vapour
Specific humidity
Specific humidity & Partial pressure of vapour

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Mass Transfer
For a binary mixture distillation process, the degree of freedom is 2. However, if the pressure is fixed in this process, the number of independent variables in this process will be

1
2
3

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Mass Transfer
The change in enthalpy per unit weight of adsorbed gas when adsorbed on gas free or "outgassed" adsorbent to from a definite concentration of adsorbate is called its

Integral heat of adsorption
Heat of wetting
Heat of normal condensation
Differential heat of adsorption

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