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Mass Transfer

Mass Transfer
A good solvent used for absorption should not have very high

Viscosity
Freezing point
All of these
Vapor pressure

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Mass Transfer
Which is the controlling factor for a drum drier?

Both A & B
Heat transfer
Diffusion
Neither A nor B

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

7
0.7
70
150

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Mass Transfer
Pore size of the molecular seive 5A is __________ mm.

5
50
0.05
0.5

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Mass Transfer
When adsorption hysteresis is observed, the desorption equilibrium pressure is __________ that obtained by adsorption.

Dependent on the system; can be either lower or higher than
Always lower than
Always higher than
Same as

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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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