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Mass Transfer

Mass Transfer
At the boiling point of the liquid at the prevailing pressure, the saturated absolute humidity becomes

None of these
?
1

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Mass Transfer
In case of non-ideal gases and liquids, the molal diffusivity

Is independent of pressure
Varies directly as the pressure
Varies inversely as the pressure
Is equal to the volumetric diffusivity

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Mass Transfer
The velocity, concentration and temperature boundary, for the boundary layer development on a flat plate during connective mass transfer will be same, if

NPr = NLe
NSc = NPr = NLe
NSc = NLe
NSc = 1

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Mass Transfer
Most important factor to be considered in the selection of packings for absorbers is the __________ of packing.

Size
Durability
Porosity
Cost

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Mass Transfer
When the temperature and humidity of air is low, we usually use __________ draft cooling tower.

Natural
None of these
Induced
Forced

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Mass Transfer
The Reynolds number of the liquid was increased 100 fold for a laminar falling film used for gas-liquid contacting. Assuming penetrating theory is applicable, the fold increase in the mass transfer co-efficient (Kc) for the same sytem is

1
5
10
100

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