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Mass Transfer

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

F
1/f
F/2
2f

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Mass Transfer
In a single stage extraction process, 10 kg of pure solvent S (containing no solute A) is mixed with 30 kg of feed F containing A at a mass fraction xf = 0.2. The mixture splits into an extract phase E and a raf-finate phase R containing A at xB = 0.5 and xR = 0.05 respectively. The total mass of the extract phase is (in Kg)

8.89
6.89
10
8.25

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Mass Transfer
Wetted wall tower experiment determines the

Mass transfer co-efficient
Volumetric co-efficient
None of these
Molal diffusivity

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

0.7
70
150
7

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Mass Transfer
An azeotropic mixture is a __________ mixture.

None of these
Binary
Ternary
Constant boiling point

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

Drum drier
Tray drier
Tunnel drier
Spray drier

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