Acetone is to be removed from air in an isothermal dilute absorber using pure water as solvent. The incoming air contains 5 mole% of acetone (yin = 0.05). The design equation to be used for obtaining the number of trays (N) of the absorber is, N+2 = 6 log (yin/yout).For 98% recovery of acetone, the number of trays required is/are

Mass Transfer
Acetone is to be removed from air in an isothermal dilute absorber using pure water as solvent. The incoming air contains 5 mole% of acetone (yin = 0.05). The design equation to be used for obtaining the number of trays (N) of the absorber is, N+2 = 6 log (yin/yout).For 98% recovery of acetone, the number of trays required is/are

10

9

1

8

10

9

1

8

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Mass Transfer
When the solvent dissolves very little of solute, then

Solvent of low freezing point should be used

Large quantity of solvent is required to extract the solute

Very small quantity of solvent is required

Solvent of low latent heat of vaporisation should be used

Solvent of low freezing point should be used

Large quantity of solvent is required to extract the solute

Very small quantity of solvent is required

Solvent of low latent heat of vaporisation should be used

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Mass Transfer
Moisture in a solid exerting an equilibrium vapour pressure equal to that of the pure liquid at the same temperature is called the __________ moisture.

Free

Unbound

Critical

Bound

Free

Unbound

Critical

Bound

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Mass Transfer
Deairation (removal of O₂) of water is done by

Absorption

Adsorption

Ion-exchange

Rectification

Absorption

Adsorption

Ion-exchange

Rectification

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Mass Transfer
Drift in a cooling tower is

All of these

The water entrained by the circulating air

Desirable

Dependent on the water lost by evaporation

All of these

The water entrained by the circulating air

Desirable

Dependent on the water lost by evaporation

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Mass Transfer
Total reflux in a distillation operation requires minimum

All of these

Condenser load

Reboiler load

Number of plates

All of these

Condenser load

Reboiler load

Number of plates

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Mass Transfer

Mass Transfer When the solvent dissolves very little of solute, then

Mass Transfer Moisture in a solid exerting an equilibrium vapour pressure equal to that of the pure liquid at the same temperature is called the __________ moisture.

Mass Transfer Deairation (removal of O₂) of water is done by

Mass Transfer Drift in a cooling tower is

Mass Transfer Total reflux in a distillation operation requires minimum

Mass Transfer
When the solvent dissolves very little of solute, then

Mass Transfer
Moisture in a solid exerting an equilibrium vapour pressure equal to that of the pure liquid at the same temperature is called the __________ moisture.

Mass Transfer
Deairation (removal of O₂) of water is done by

Mass Transfer
Drift in a cooling tower is

Mass Transfer
Total reflux in a distillation operation requires minimum