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Mass Transfer

Mass Transfer
Mass transfer co-efficient (K) and diffusivity (D) are related according to film theory as

K ∝ D1.5
K ∝ D2
K ∝ D
K ∝ √D

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Mass Transfer
The dew point of an unsaturated gas-vapor mixture does not depend upon the __________ of the mixture.

Temperature
All of these
Composition
Total pressure

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Mass Transfer
The diffusivity (D) in a binary gas mixture is related to the pressure (P) as

D ∝ P0.5
D ∝ 1/P
D ∝ 1/P0.5
D ∝ 1/P1.5

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Mass Transfer
Which of the following unit operations makes use of Thiele-Geddes equation?

Liquid-liquid extraction
Multicomponent distillation
Solid-liquid extraction
Multicomponent absorption with chemical reaction

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Mass Transfer
The Kundsen diffusivity is proportional to (where, T = absolute temperature)

√T
T⁴
T²
T

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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.

Relative
Molal
Percentage
None of these

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