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Mass Transfer

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

0.1
10-5 to 10-6
> 1
0.01

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Mass Transfer
In an absorption coloumn, the flooding velocity for random packing is __________ that for stacked/regular packing.

Either A, or B ; depends on the type of packing
Smaller than
Greater than
Equal to

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Mass Transfer
Can the efficiency of a plate in the distillation tower be greater than 100%?

Yes ; if the reflux ratio is maximum
Never
Yes
Normally not; but is possible if infinite number of plates are put

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Mass Transfer
The equipment frequently used for adiabatic humidification-cooling operation with recirculating liquid is

None of these
Induced draft cooling tower
Natural draft cooling tower
Spray chamber

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Mass Transfer
Binary distillation involves the mass transfer by __________ at the gas-liquid interface.

Either A or B
A counter diffusion at an almost equal molar rate
Unidirectional diffusion from liquid to gas phase
Unidirectional diffusion from gas to liquid phase

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Mass Transfer
Which of the following unit operations makes use of Thiele-Geddes equation?

Multicomponent absorption with chemical reaction
Multicomponent distillation
Solid-liquid extraction
Liquid-liquid extraction

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