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Mass Transfer

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

Neither A nor B
Across
Above
Both A & B

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Mass Transfer
Plate efficiency in a distillation column is reduced due to the __________ of liquid.

Entrainment
Weeping & dumping
All of these
Foaming

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Mass Transfer
For a distillation column operating at minimum reflux, the

Number of plates required will be maximum
None of these
Concentration of liquid and vapour leaving a plate will be same
Reflux ratio will be maximum

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Mass Transfer
As complete saturation of an adsorbent is approached, the differential heat of adsrop-tion approaches

Zero
Integral heat of adsorption
None of these
That of normal condensation

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Mass Transfer
For the same system, if the same liquid used in an absorber is decreased, the tower height will

Decrease
Increase
Decrease or increase ; depends on the type of liquid
Remain unaffected

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Mass Transfer
If mass diffusivity in a mixture is equal to the thermal diffusivity, then the Lewis number is

1
< 1
> 1

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