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Mass Transfer

Mass Transfer
Desirable value of absorption factor in an absorber is

> 1
0.5
< 1
1

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Mass Transfer
Unit of molal diffusivity is

Cm²/sec gm . mole
Gm moles/cm² . sec
Gm moles/cm. sec
Gm moles/cm². sec

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Mass Transfer
The relative humidity of air decreases in-spite of an increase in the absolute humidity, when the

Temperature falls
Pressure falls
Temperature rises
Pressure rises

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Mass Transfer
The efficiency of a plate column will be maximum, when the flow is ideal __________ the plate.

Across
Neither A nor B
Above
Both A & B

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

Linear
Exponential
Logarithmic
Inverse

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Mass Transfer
In distillation columns, the number of bubble caps per tray primarily depends upon the

Allowable liquid velocity
Allowable gas velocity
Feed composition
Allowable gas and liquid velocities

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