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Mass Transfer

Mass Transfer
Schmidt number is given by

Sh x Pe
Re.Pe
Μ/ρDAB
Re/Pe

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Mass Transfer
__________ column is used in gas absorption process.

Bubble cap
Packed
Seive/perforated tray
Wetted wall

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Mass Transfer
__________ diffusion is used for separating the isotopes of methane.

Pressure
Thermal
Force
Concentration

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Mass Transfer
Acetone is to be removed from air in an isothermal dilute absorber using pure water as solvent. The incoming air contains 5 mole% of acetone (yin = 0.05). The design equation to be used for obtaining the number of trays (N) of the absorber is, N+2 = 6 log (yin/yout).For 98% recovery of acetone, the number of trays required is/are

9
10
8
1

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Mass Transfer
In case of an ideal solution, the total vapor pressure varies __________ with the composition expressed as mole fraction,

Exponentially
Linearly
Inversely
None of these

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

Cost
Size
Porosity
Durability

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