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Mass Transfer

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

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

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Mass Transfer
Air at a particular humidity is heated in a furnace. The new dew point

Depends on the extent of heating
Increases
Remain unchanged
Decreases

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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
Which of the following has the same dimension as mass diffusivity?

Momentum flux
Thermal diffusivity
Kinematic viscosity
Both Momentum flux & Kinematic viscosity

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Mass Transfer
For contacting a highly soluble gas with a liquid

Spray the liquid on gas stream
Bubble the gas through liquid
Both of the options given here
None of the listed here

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Mass Transfer
In case of absorption & stripping, the interface of the liquid & gas phases are present in equilibrium, when the diffusional resistance of __________ is zero.

Liquid phase
Gas phase
All of these
Interface

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