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Mass Transfer

Mass Transfer
Diameter to height ratio for a rashig ring is

0.5
1
5
2

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Mass Transfer
Which of the following assumes constant molal vaporisation and overflow?

Ponchan-Savarit method
McCabe-Thiele method
Enthalpy concentration method
Plate absorption column

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Mass Transfer
For gas absorption, low viscosity solvents are preferred, because of their

Low pumping pressure drop
All of these
Rapid absorption rates
Better flow characteristics

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Mass Transfer
Leaching of sugar from sugar beets is done by

Dilute H₂SO₄
Lime water
Hexane
Hot water

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Mass Transfer
In a moderately sized packed absorption tower, channeling (which is most severe with stacked packings) can be minimised by taking the ratio of tower diameter to packing diameter

< 8 : 1
> 8:1
> 4 :1
< 6:1

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Mass Transfer
__________ is used as an 'entrainer' for the separation of acetic acid-water mixture by distillation.

Furfural
Benzol
Butyl acetate
Hexane

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