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Mass Transfer

Mass Transfer
Calcium ammonium nitrate (a fertiliser) is dried in a __________ dryer.

Tray
Rotary
Vacuum
Tunnel

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Mass Transfer
A minimum boiling azeotrope is exemplified by

Water-isobutyl alcohol
None of these
Toluene-benzene
Acetone-carbon disulphide

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Mass Transfer
In distillation column design, the McCabe-Thiele procedure is inadequate and a Ponchan-Savarit procedure is needed, when

An azeotrope forms
Saturated feed is not used
A total condenser is used
The latent heat of vaporisation of the more and less volatile components are greatly different

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Mass Transfer
Perforated plate towers are unique for solvent extraction because, they provide

Higher contact area
Better contact of the phase
None of these
Repeated coalescence & redispersion of the drop phase

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Mass Transfer
Gaseous diffusivity at atmospheric pressure is of the order of __________ cm²/second.

1 to 5
> 10
1
5 to 10

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Mass Transfer
Fractional solvent extraction

Results in low interfacial tension
Employs only one solvent
None of the listed here
Employs two solvents

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