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Mass Transfer

Mass Transfer
Humid volume, at a given temperature is a/an __________ function of humidity.

Inverse
Linear
Logarithmic
Exponential

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Mass Transfer
According to the Fenske equation, what will be the minimum number of plates required in a distillation column to separate an equimolar binary mixture of components A and B into an overhead fraction containing 99 mol% A and a bottom fraction containing 98 mol% B? Assume that relative volatility (αAB = 2) does not change appreciably in the coloumn.

10
8
6
12

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Mass Transfer
When adsorption hysteresis is observed, the desorption equilibrium pressure is __________ that obtained by adsorption.

Always higher than
Same as
Always lower than
Dependent on the system; can be either lower or higher than

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Mass Transfer
For a binary mixture with low relative volatility,

An azeotrope may be formed during distillation
Use molecular distillation
Use high pressure distillation
Use steam distillation

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Mass Transfer
On addition of solute in the solvent, the __________ of the solution decreases.

Both B and C
Boiling point
Freezing point
Vapour pressure

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Mass Transfer
Diffusion co-efficient generally depends upon the temperature, pressure & the nature of the components of the system. Its dimension is not the same as that of the

Volumetric diffusivity
Thermal diffusivity
Kinematic viscosity
Mass transfer co-efficient

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