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Mass Transfer

Mass Transfer
Leaching of coarse solid lumps is also termed as

Percolation
Decoction
Agitation and settling
Dissolution

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Mass Transfer
The binary diffusivity in gases and liquids vary respectively as

T3/2 and √T
√T and T3/2
T and T3/2
T3/2 and T

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Mass Transfer
A binary mixture of benzene and cyclohexane is separated by

Solvent extraction
Ordinary distillation
Flash vaporisation
Extractive distillation

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Mass Transfer
For ethanol-water system, the lowering of distillate quality from 95% to 92% will cause __________ plate requirement.

None of the listed here
Marginal decrease in the number of
Major decrease in the number of
No change in theoretical

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Mass Transfer
The reason for preferring packed towers over plate towers in distillation practice is that the packed tower operation gives

Low pressure drop and low hold up
Low pressure drop and high hold up
High pressure drop and high hold up
High pressure drop and low hold up

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Mass Transfer
Which of the following adsorbent is used to decolourise yellow glycerine?

Fuller
Alumina
Silica gel
Activated carbon

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