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Mass Transfer

Mass Transfer
The unit of volumetric diffusivity is

Cm³/sec
Cm/sec
Cm²/sec
Cm²/seC₂

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Mass Transfer
The main reason for dividing a tall packed tower into series of small towers is to

Avoid flooding
Avoid channeling
Reduce liquid hold up
Minimise the overall pressure drop

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Mass Transfer
Penetration model (theory) for mass transfer was enunciated by

Higbie
Kissinevskii
Danckwerts
Toor and Marchello

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Mass Transfer
For a binary mixture with low relative volatility, continuous rectification to get pure products will require

Small cross-section column
Low reflux ratio
Less number of trays
High reflux ratio

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Mass Transfer
Which of these columns incurs the lowest pressure drop?

Packed column (with stacked packing)
Packed column (with dumped packing)
Pulse column
Bubble plate column

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Mass Transfer
The minimum number of theoretical plates is required for achieving a given separation in distillation column with

Zero reflux ratio
Total reflux
No reflux
Minimum reflux ratio

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MORE MCQ ON Mass Transfer

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