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Mass Transfer

Mass Transfer
__________ column is used in gas absorption process.

Packed
Wetted wall
Bubble cap
Seive/perforated tray

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Mass Transfer
The Reynolds number of the liquid was increased 100 fold for a laminar falling film used for gas-liquid contacting. Assuming penetrating theory is applicable, the fold increase in the mass transfer co-efficient (Kc) for the same sytem is

10
100
5
1

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Mass Transfer
Which one of the following devices is not used for both the absorption as well as the liquid-liquid extraction processes?

Spray towers
Packed towers
Plate towers
Wetted wall columns

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Mass Transfer
Absorption factor method is used to calculate the number of ideal stages, when

Both operating and equilibrium lines are parallel
Operating line lies above the equilibrium line
Pressure drop in the column is very high
Operating line lies below the equilibrium line

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Mass Transfer
Though, theoretically the adsorption & desorption isotherms is expected to coincide but sometimes at least a part of the isotherms does not coincide and this phenomenon is known as adsorption hysterisis. In such cases, the desorption equilibrium pressure is __________ that obtained for adsorption.

Lower than
Either same or higher than
Same as
Higher than

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Mass Transfer
A binary mixture of benzene and cyclohexane is separated by

Extractive distillation
Ordinary distillation
Flash vaporisation
Solvent extraction

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