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Mass Transfer

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

Across
Above
Neither A nor B
Both A & B

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Mass Transfer
The rough value of diffusion co-efficient of water vapor into air at 25°C may be about __________ cm²/sec.

1.25
2.5
0.25
0.0025

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Mass Transfer
Desirable value of absorption factor in an absorber is

> 1
< 1
1
0.5

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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
And the heat required in reboiler decreases
Decreases

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Mass Transfer
In a packed bed absorption column, the channelling will be noted by the

None of these
Increase in flow rate
Sharp drop in pressure drop
Sharp rise in pressure drop

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Mass Transfer
The relation, Sc = Pr = 1, is valid, when the mechanism of __________ ansfer is same.

Mass and momentum
Heat, momentum and mass
Heat and mass
Heat and momentum

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