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Mass Transfer

Mass Transfer
When both the fluids flow concurrently in an absorber, the slope of the operating line is

-1
+ ve
1
- ve

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Mass Transfer
Though, theoretically the adsorption & desorption isotherms is expected to coincide but sometimes at least a part of the isotherms does not coincide and this phenomenon is known as adsorption hysterisis. In such cases, the desorption equilibrium pressure is __________ that obtained for adsorption.

Higher than
Same as
Either same or higher than
Lower than

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Mass Transfer
Equilibrium-moisture curves of different solids

Depend on the humidity of the gas
Are different
None of these
Are same

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Mass Transfer
For which of the following unit operations, Lewis number is of significance?

Humidification
Binary distillation
Adsorption
Gas absorption

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Mass Transfer
In a distillation column, with increase in the reflux ratio, the heat removed in the cooler

Increases
Remains unaffected
Decreases
And the heat required in reboiler decreases

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Mass Transfer
In an absorption coloumn, the flooding velocity for random packing is __________ that for stacked/regular packing.

Equal to
Either A, or B ; depends on the type of packing
Greater than
Smaller than

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