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Mass Transfer

Mass Transfer
Liquid diffusivity is of the order of __________ cm² /second.

0.1
10-5 to 10-6
> 1
0.01

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Mass Transfer
Though, theoretically the adsorption & desorption isotherms is expected to coincide but sometimes at least a part of the isotherms does not coincide and this phenomenon is known as adsorption hysterisis. In such cases, the desorption equilibrium pressure is __________ that obtained for adsorption.

Same as
Higher than
Lower than
Either same or higher than

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Mass Transfer
Which of the following parameters remains almost constant during adiabatic saturation of unsaturated air?

Dew point
Wet bulb temperature
None of these
Dry bulb temperature

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Mass Transfer
Penetration model (theory) for mass transfer was enunciated by

Kissinevskii
Toor and Marchello
Higbie
Danckwerts

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Mass Transfer
During constant rate period, the rate of drying decreases with the

Increase in air humidity
Decrease in air temperature
Both A & B
Neither A nor B

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Mass Transfer
The partial pressure distribution of an ideal gas diffusing through another stagnant ideal gas at steady state follows a/an __________ law.

Parabolic
Linear
Exponential
Cubic

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