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Mass Transfer

Mass Transfer
Gaseous diffusivity at atmospheric pressure is of the order of __________ cm²/second.

1 to 5
5 to 10
1
> 10

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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

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

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Mass Transfer
__________ column is used in gas absorption process.

Bubble cap
Packed
Wetted wall
Seive/perforated tray

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Mass Transfer
Equilibrium moisture of a solid is equal to the total moisture minus free moisture. Which of the following substances will have maxi-mum equilibrium moisture?

Rag paper
Anthracite coal
Bamboo
Inorganic solids

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Mass Transfer
Mass transfer rate between two fluid phases does not necessarily depend on the __________ of the two phases.

Physical properties
Degree of turbulence
Chemical properties
Interfacial area

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Mass Transfer
The expression, y(1 - x)/x(1 - y) is for

Selectivity
Relative volatility
Absorption factor
Murphree efficiency

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