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Mass Transfer

Mass Transfer
In case of liquids, the binary diffusivity is proportional to (where, T = temperature)

T
√T
1/T
T²

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Mass Transfer
Humidity chart is useful for the solution of problems concerning condensation, vaporisation and air conditioning. At a given dry bulb temperature, value of humidity obtained from the humidity chart directly, is in terms of __________ humidity.

Molal
None of these
Percentage
Relative

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Mass Transfer
For the flow of gases through a capillary, with increase in temperature, the permeability __________ as per Knudsen law.

Decreases
Either A or B; depends on the gas
Remains same
Increases

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Mass Transfer
Azeotropic distillation is employed to separate

Mixture with very high relative volatility
Constant boiling mixture
Heat sensitive materials
High boiling mixture

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

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

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Mass Transfer
At the same gas flow rate, the pressure drop in a packed tower being irrigated with liquid __________ that in dry packed tower.

Is greater than
Cannot be predicted as data are insufficient
Is same as
Is lower than

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