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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
In a packed tower, the value of HETP equals HTUOG, when the equilibrium and the operating lines are (where, HETP = height equivalant to a theoretical plate HTUOG = overall gas phase height of a transfer unit)

Neither A nor B
Straight
Both A & B
Parallel

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Mass Transfer
The relative humidity of air decreases in-spite of an increase in the absolute humidity, when the

Pressure rises
Temperature rises
Pressure falls
Temperature falls

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Mass Transfer
Smoke is an example of

Solid dispersed in gas
Liquid dispersed in gas
Solid dispersed in liquid
Gas dispersed in liquid

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Mass Transfer
______ extractor uses centrifugal force for separating the two phases.

Schiebel
Podbielniak
None of the listed here
Treybal

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Mass Transfer
Gaseous diffusion co-efficient increases with increase in the

Temperature
Pressure
Both Pressure & Temperature
None of the listed here

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