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Mass Transfer

Mass Transfer
At what percentage (by volume) of alcohol composition, it forms an azeotrope with water?

95
99
91.5
90

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Mass Transfer
For experimental determination of mass transfer co-efficient by wetted wall tower, the mass transfer area is

Unknown
Calculated
Not required
Known

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Mass Transfer
Equilibrium moisture of a solid is equal to the total moisture minus free moisture. Which of the following substances will have maxi-mum equilibrium moisture?

Anthracite coal
Inorganic solids
Bamboo
Rag paper

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Mass Transfer
Very tall packed towers are divided into series of beds to

Reduce the overall pressure drop
Avoid flooding
Avoid channelling
Reduce liquid hold-up

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Mass Transfer
In the layout plan for a vacuum distillation unit, operating at 60 mm Hg, supported by a barometric condenser, the appropriate place for the location of vacuum drum for collecting the distillate will be

10 metres above ground
5 metres above ground
At ground level
2 metres above the ground

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Mass Transfer
Extraction of pencillin employs a __________ extraction coloumn.

Packed
Centrifugal
Plate
None of these

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