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 At some point of time, the operation is shifted to total reflux condition (i.e., no product and residue are being withdrawn and feed to the column is stopped).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 At some point of time, the operation is shifted to total reflux condition (i.e., no product and residue are being withdrawn and feed to the column is stopped).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,

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

The top and bottom compositions correspond to the maximum enrichment available

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

Reboiler load and condenser load are minimum

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

The top and bottom compositions correspond to the maximum enrichment available

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

Reboiler load and condenser load are minimum

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Mass Transfer
Molarity is defined as the number of gm moles of solute per __________ of solvent.

Kg

Gm

c

Litre

Kg

Gm

c

Litre

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Mass Transfer
Fractional solvent extraction

Employs two solvents

Employs only one solvent

None of the listed here

Results in low interfacial tension

Employs two solvents

Employs only one solvent

None of the listed here

Results in low interfacial tension

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Mass Transfer
Physical absorption is

An irreversible phenomenon

Accompanied by evolution of heat

Both B & C

A reversible phenomenon

An irreversible phenomenon

Accompanied by evolution of heat

Both B & C

A reversible phenomenon

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Mass Transfer
The temperature of water cooled in cooling tower is always __________ temperature of entering air.

Equal to the wet bulb

More than the wet bulb

Less than the wet bulb

Equal to the dry bulb

Equal to the wet bulb

More than the wet bulb

Less than the wet bulb

Equal to the dry bulb

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Mass Transfer
When an unsaturated air-water mixture is heated at constant pressure, then

The relative humidity increases

The relative humidity decreases

The specific humidity decreases

The partial pressure of water vapour increases

The relative humidity increases

The relative humidity decreases

The specific humidity decreases

The partial pressure of water vapour increases

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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 Molarity is defined as the number of gm moles of solute per __________ of solvent.

Mass Transfer Fractional solvent extraction

Mass Transfer Physical absorption is

Mass Transfer The temperature of water cooled in cooling tower is always __________ temperature of entering air.

Mass Transfer When an unsaturated air-water mixture is heated at constant pressure, then

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
Molarity is defined as the number of gm moles of solute per __________ of solvent.

Mass Transfer
Fractional solvent extraction

Mass Transfer
Physical absorption is

Mass Transfer
The temperature of water cooled in cooling tower is always __________ temperature of entering air.

Mass Transfer
When an unsaturated air-water mixture is heated at constant pressure, then