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Mass Transfer

Mass Transfer
If Rm is the minimum reflux ratio, the optimum reflux ratio may be around __________ Rm.

1.2 to 1.5
3 to 4
2.5 to 3
5

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Mass Transfer
The solvent used in liquid-liquid extraction should have __________ less than one.

Distribution co-efficient
Neither A nor B
Both A & B
Selectivity

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Mass Transfer
Which of the following is an undesirable characteristic for the solvent used in gas absorption?

None of these
High gas solubility
Low vapor pressure
Low viscosity

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Mass Transfer
For the same process conditions, the reflux ratio of an unlagged distillation column

Decreases in winter
None of these
Increases in winter
Increases in summer

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Mass Transfer
For the same feed, feed quality and separation (in a distillation column), with the increase of total pressure, the number of ideal plates will

Increase
Decrease
Data insufficient, can't be predicted
Remain same

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Mass Transfer
Leaching of uranium ore and gold ore is done in

Bollman extractor
None of these
Pachuka tanks
Centrifugal extractor

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