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Mass Transfer

Mass Transfer
Berl saddle made of carbon cannot be used for

H₂SO₄
Oxidising atmosphere
Alkalis
SO₂

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Mass Transfer
Back-trapping in a distillation column

Decreases tray efficiency
Reduces pressure drop
Increases tray efficiency
Is desirable, as it provides improved vapour-liquid contact

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Mass Transfer
Absorption (liquid-gas system) with evolution of heat as compared to isothermal absorption results in

Large minimum liquid to gas (L/G) ratio
Decreased solute solubility
Large number of trays
All of these

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Mass Transfer
Steady state equimolal counter diffusion is encountered in

Absorption of NH₃ from air by water
All of these
All liquid-liquid diffusion systems
Separation of a binary mixture by distillation

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Mass Transfer
Which of the following quantities need not be fixed before starting the design of a co-current absorber?

Heat gain or loss
Flow rate of gas
None of the listed here
Flow rate of entering liquid

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Mass Transfer
The adiabatic saturation curve for a vapour-gas mixture is

Slightly concave upward
Straight line
None of these
Slightly concave downward

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