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Mass Transfer

Mass Transfer
The fixed cost of a distillation column at minimum reflux ratio is

Optimum
Infinite
None of these
Minimum

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Mass Transfer
Pressure drop through plate tower as compared to that through packed tower, for the same duty will be

Either A or B; depends on the packing height
Less
Equal
More

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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)

500
100
1000
50

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Mass Transfer
Under conditions of flooding in packed tower, the gas pressure drop

Is maximum
Decreases rapidly
Remains constant
Increases rapidly

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Mass Transfer
Prandtl number for water at 20°C is about

0.7
70
150
7

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Mass Transfer
In a solution containing 0.30 Kg mole of solute and 600 kg of solvent, the molality is

1
2
0.6
0.5

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