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Mass Transfer

Mass Transfer
The mass diffusivity, the thermal diffusivity and the eddy momentum diffusivity are same for, NPr = NSc = __________

4
2
1
3

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Mass Transfer
Dimension of mass diffusivity is the same as that of

Kinematic viscosity
Surface tension
Pressure
Dynamic viscosity

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Mass Transfer
Use of packed towers for distillation is generally limited to the

Multicomponent distillation
Small sizes
Vacuum distillation
High pressure operation

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Mass Transfer
If moisture content of solid on dry basis is X, then the same on wet basis is

(X + 1)/X
X/(X + 1)
X/(X - 1)
(X - 1)/X

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Mass Transfer
Pressure drop through plate tower as compared to that through packed tower, for the same duty will be

Less
More
Either A or B; depends on the packing height
Equal

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Mass Transfer
__________ columns are used for liquid dispersion in a continuous gas phase.

Packed
Sieve plate
Bubble cap
Pulse

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