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Mass Transfer

Mass Transfer
The value of Lewis number (Le = Sc/Pr) for air-water vapour system is around

600
1
3.97
0.24

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

Both Pressure & Temperature
Pressure
None of the listed here
Temperature

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Mass Transfer
Hypersorption refers to a __________ process.

Fixed bed absorption
Moving bed adsorption
Moving bed absorption
Fixed bed adsorption

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Mass Transfer
Condensation of a vapour-gas mixture just begins, when (where, p = partial pressure of the vapour P = vapour pressure of the liquid )

P < P
P
P = P
P >>P

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

10-5 to 10-6
0.01
0.1
> 1

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Mass Transfer
Pick out the correct relationship. (where, Ri = internal reflux ratio Ro = external reflux ratio. )

(1 + Ri) = Ro/Ri
(1 - Ri) = Ro/Ri
(1 + Ro) = Ro/Ri
(1 - Ro) = Ro/Ri

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