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Mass Transfer

Mass Transfer
The value of L/mG ratio for economical absorption operation ranges from

2.5 to 3.5
0.8 to 1.2
1.25 to 2.0
0.5 to 0.8

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Mass Transfer
In a counter-current extractor, as the axial mixing increases, the extraction efficiency

Remains unchanged
Depends on the pressure of the system
Increases
Decreases

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Mass Transfer
In the layout plan for a vacuum distillation unit, operating at 60 mm Hg, supported by a barometric condenser, the appropriate place for the location of vacuum drum for collecting the distillate will be

10 metres above ground
2 metres above the ground
At ground level
5 metres above ground

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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
Raoult's law is applicable to the

Mixture of water and alcohol
Non-ideal gases
Real solutions
Ideal solutions

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Mass Transfer
Prandtl number for water at 20°C is about

150
7
70
0.7

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