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Mass Transfer

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

95
91.5
99
90

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Mass Transfer
Which of the following parameters remains almost constant during adiabatic saturation of unsaturated air?

None of these
Dry bulb temperature
Wet bulb temperature
Dew point

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Mass Transfer
The interfacial area per unit volume of dispersion, in a gas-liquid contactor, for fractional hold up of gas = 0.1 and gas bubble diameter = 0.5 mm is given by (in m²/m³)

100
500
50
1000

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Mass Transfer
Most important factor to be considered in the selection of packings for absorbers is the __________ of packing.

Cost
Size
Durability
Porosity

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Mass Transfer
Operating velocity in a packed tower is usually __________ the flooding velocity.

Equal to
More than
Twice
Half

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Mass Transfer
Overall efficiency of the distillation column is

Same as the Murphree efficiency
The ratio of number of actual plates to ideal plates
Always more than the point efficiency
The ratio of number of ideal plates to actual plates

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