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Mass Transfer

Mass Transfer
The unit of volumetric diffusivity is

Cm²/sec
Cm/sec
Cm³/sec
Cm²/seC₂

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

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

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Mass Transfer
The cooling effect in a cooling tower can be speeded up by

All of the listed here
Increasing the air velocity and area of exposed wet surface
Reducing the humidity of the air
Reducing the barometric pressure

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Mass Transfer
If the amount of the steam used in steam distillation is increased, the temperature of distillation

Decreases
Depends on relative volatility
Increases
Remains unchanged

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Mass Transfer
Sodium bicarbonate is produced during soda ash manufacture using a __________ tower.

None of these
Baffle
Plate
Packed

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Mass Transfer
In continuous distillation, the internal reflux ratio (Ri) and the external reflux ratio (Re) are related as

Ri = Re
Ri = Re/(1 - Re)
Ri = Re/(1 + Re)
Ri = (1 - Re)/Re

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