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Mass Transfer

Mass Transfer
Diameter to height ratio for a rashig ring is

2
1
0.5
5

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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

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

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

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

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Mass Transfer
Fenske-Underwood equation used for calculating the minimum number of theoretical plates in distillation column is valid for

Constant relative volatility
Constant molal overflow
All of these
Total reflux

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Mass Transfer
During drying operation, it is easier to remove the __________ moisture.

Bound
Unbound
Equilibrium
Critical

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Mass Transfer
To increase the absorption factor, (where, G = gas flow rate, S = solvent flow rate)

Increase 'G' and decrease 'S'
Increase both 'G' and 'S'
Decrease both 'G' and 'S'
Increase 'S' and decrease 'G'

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