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Mass Transfer

Mass Transfer
When the feed to a distillation column is a saturated liquid, slope of the feed line is

None of these
Infinity
Zero
Unity

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Mass Transfer
Liquid diffusivity is of the order of __________ cm² /second.

> 1
10-5 to 10-6
0.1
0.01

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

None of these
Bollman extractor
Centrifugal extractor
Pachuka tanks

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Mass Transfer
Which of the following is the most suitable for extraction in a system having very low density difference?

Pulsed extractor
Mixer-settler extractor
Packed extraction tower
Centrifugal extractor

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Mass Transfer
The diffusivity (D) in a binary gas mixture is related to the temperature (T) as

D ∝ T2
D ∝ T
D ∝ T1.5
D ∝ T0.5

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Mass Transfer
Most important factor to be considered in the selection of packings for absorbers is the __________ of packing.

Durability
Size
Cost
Porosity

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