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Mass Transfer

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

K ∝ √D
K ∝ D2
K ∝ D1.5
K ∝ D

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Mass Transfer
According to Poiseuille's law, the permeability for gas flow through a capillary is proportional to (where, μ = gas viscosity)

1/μ
μ
√μ
μ²

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Mass Transfer
Molecular seives are regenerated by heating to __________ °C.

> 500
200-330
> 1000
< 150

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Mass Transfer
The-relative volatility for separation of a non-ideal binary mixture by distillation should be

> 1
< 1
1

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Mass Transfer
Stacked packing compared to dumped packing

Both A & B
Gives higher pressure drop
Provides poorer contact between the fluids
Gives lower pressure drop

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Mass Transfer
On addition of solute in the solvent, the __________ of the solution decreases.

Freezing point
Boiling point
Vapour pressure
Both B and C

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