A distillation column with N plates is being operated under normal conditions. At some point of time, the operation is shifted to total reflux condition (i.e., no product and residue are being withdrawn and feed to the column is stopped). At the new steady state,

Mass Transfer
A distillation column with N plates is being operated under normal conditions. At some point of time, the operation is shifted to total reflux condition (i.e., no product and residue are being withdrawn and feed to the column is stopped). At the new steady state,

Reboiler load and condenser load are minimum

Composition of vapors and that of liquid do not vary throughout the column

The top and bottom compositions are unchanged with and without total reflux

The top and bottom compositions correspond to the maximum enrichment available

Reboiler load and condenser load are minimum

Composition of vapors and that of liquid do not vary throughout the column

The top and bottom compositions are unchanged with and without total reflux

The top and bottom compositions correspond to the maximum enrichment available

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Mass Transfer
The most common packing used in industrial operations is __________ rings.

Lessing

Cross-partition

Raschig

Single spiral

Lessing

Cross-partition

Raschig

Single spiral

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Mass Transfer
In stripping section of continuous distillation column, the

Vapour is stripped of low boiler

Liquid is enriched with high boiler

Liquid is stripped of high boiler

None of these

Vapour is stripped of low boiler

Liquid is enriched with high boiler

Liquid is stripped of high boiler

None of these

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Mass Transfer
Diffusion co-efficient generally depends upon the temperature, pressure & the nature of the components of the system. Its dimension is not the same as that of the

Mass transfer co-efficient

Kinematic viscosity

Volumetric diffusivity

Thermal diffusivity

Mass transfer co-efficient

Kinematic viscosity

Volumetric diffusivity

Thermal diffusivity

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Mass Transfer
For the case of flow of air past a wet bulb thermometer (air water vapour system), the approximate value of H₂/ky.Cz is around

0.6

0.24

0.72

1

0.6

0.24

0.72

1

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Mass Transfer
If the solubilities of different components (in a liquid-liquid extraction system) increase with rise in temperature, then the temperature above which they dissolve completely is known as the critical solution temperature (CST or consolute temperature). If solubilities increase with decrease in temperature, then CST is the temperature below which they dissolve completely. If a binary system has no critical solution temperature, it implies that

The system comprises of partially mis-cible liquids

On heating, a vapor phase will appear ; while on cooling, a solid phase will appear

The system comprises of an azeotrope

The system comprises of miscible liquids

The system comprises of partially mis-cible liquids

On heating, a vapor phase will appear ; while on cooling, a solid phase will appear

The system comprises of an azeotrope

The system comprises of miscible liquids

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Mass Transfer

Mass Transfer A distillation column with N plates is being operated under normal conditions. At some point of time, the operation is shifted to total reflux condition (i.e., no product and residue are being withdrawn and feed to the column is stopped). At the new steady state,

Mass Transfer The most common packing used in industrial operations is __________ rings.

Mass Transfer In stripping section of continuous distillation column, the

Mass Transfer Diffusion co-efficient generally depends upon the temperature, pressure & the nature of the components of the system. Its dimension is not the same as that of the

Mass Transfer For the case of flow of air past a wet bulb thermometer (air water vapour system), the approximate value of H₂/ky.Cz is around

Mass Transfer
A distillation column with N plates is being operated under normal conditions. At some point of time, the operation is shifted to total reflux condition (i.e., no product and residue are being withdrawn and feed to the column is stopped). At the new steady state,

Mass Transfer
The most common packing used in industrial operations is __________ rings.

Mass Transfer
In stripping section of continuous distillation column, the

Mass Transfer
Diffusion co-efficient generally depends upon the temperature, pressure & the nature of the components of the system. Its dimension is not the same as that of the

Mass Transfer
For the case of flow of air past a wet bulb thermometer (air water vapour system), the approximate value of H₂/ky.Cz is around