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Mass Transfer

Mass Transfer
Moisture contained by a substance in excess of the equilibrium moisture is called the __________ moisture.

Critical
Free
Bound
Unbound

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Mass Transfer
Gaseous diffusivity at atmospheric pressure is of the order of __________ cm²/second.

1 to 5
5 to 10
> 10
1

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Mass Transfer
The value of L/mG ratio for economical absorption operation ranges from

0.8 to 1.2
1.25 to 2.0
2.5 to 3.5
0.5 to 0.8

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Mass Transfer
For __________ drying, the effects of velocity, temperature and humidity of the gas and the thickness of the solid are the same.

Both A & B
Neither A nor B
Constant rate
Unsaturated surface

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Mass Transfer
In stripping section of continuous distillation column, the

None of these
Liquid is stripped of high boiler
Vapour is stripped of low boiler
Liquid is enriched with high boiler

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Mass Transfer
__________ diffusion is used for separating the isotopes of methane.

Thermal
Force
Pressure
Concentration

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