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Mass Transfer

Mass Transfer
At what value of reflux ratio, number of theoretical plates in a distillation column is minimum?

∞
< 1
1

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Mass Transfer
At __________ reflux, theoretical number of plates in a distillation coloumn is calculated using Fenske-Underwood equation.

Operating
Maximum permissible
Total
Minimum

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Mass Transfer
Binary distillation involves the mass transfer by __________ at the gas-liquid interface.

Unidirectional diffusion from gas to liquid phase
Either A or B
A counter diffusion at an almost equal molar rate
Unidirectional diffusion from liquid to gas phase

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Mass Transfer
In a packed bed absorption column, the channelling will be noted by the

None of these
Sharp rise in pressure drop
Increase in flow rate
Sharp drop in pressure drop

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Mass Transfer
Psychrometry deals with the properties of gas-vapor mixture. Humidity can be determined by the measurement of the __________ of a fibre.

Strength
Thermal conductivity
None of the listed here
Electrical resistance

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Mass Transfer
If a₁ and a₂ are the relative volatilities when the pressure in the distillation column is 1 and 2 atm respectively. Pick out the correct statement.

None of these
a₁ = 0.5 a₂
a₁ = a₂
a₁ = 2a₂

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