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Mass Transfer

Mass Transfer
According to Chilton-Colburn analogy for mass transfer, NSt.NSc2/3 is equal to

2f
1/f
F
F/2

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

Slightly concave upward
None of these
Straight line
Slightly concave downward

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Mass Transfer
Which of the following is not a continuous drier?

Spray drier
Tray drier
Drum drier
Tunnel drier

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Mass Transfer
At what value of reflux ratio, number of theoretical plates in a distillation column is minimum?

< 1
∞
1

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Mass Transfer
Back-trapping in a distillation column

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

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Mass Transfer
A minimum boiling azeotrope is exemplified by

Water-isobutyl alcohol
None of these
Acetone-carbon disulphide
Toluene-benzene

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