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Mass Transfer

Mass Transfer
Danckwerts developed the __________ theory.

Film
Penetration
None of these
Surface renewal

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Mass Transfer
Humidification involves mass transfer between a pure liquid phase and a fixed gas, which is

Soluble in the liquid
At a fixed temperature
Non-ideal in nature
Insoluble in the liquid

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Mass Transfer
Diameter to height ratio for a rashig ring is

1
0.5
2
5

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Mass Transfer
The Hatta number is important in

Gas absorption without chemical reaction
Gas absorption with chemical reaction
Binary distillation
Multicomponent distillation

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Mass Transfer
Which of the following operations does not involve leaching?

Dissolving pharmaceutical products from bark or roots
Removing nicotine from its water solution by kerosene
Dissolving gold from ores
Dissolving sugar from the cells of the beet

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Mass Transfer
Use of packed towers for distillation is generally limited to the

Multicomponent distillation
Small sizes
Vacuum distillation
High pressure operation

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