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

1

8

9

10

1

8

9

10

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Mass Transfer
When the mixture to be distilled has a very high boiling point and the product material is heat sensitive, the separation technique to be used is __________ distillation.

None of these

Azerotropic

Steam

Continuous

None of these

Azerotropic

Steam

Continuous

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Mass Transfer
As the reflux ratio in a distillation coloumn is increased from the minimum, the

Slope of the operating line in stripping section decreases

Total cost first decreases and then increases

Number of plates decreases very slowly first and then more and more rapidly

Liquid flow increases while the vapor flow decreases for a system

Slope of the operating line in stripping section decreases

Total cost first decreases and then increases

Number of plates decreases very slowly first and then more and more rapidly

Liquid flow increases while the vapor flow decreases for a system

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Mass Transfer
Separation of two volatile liquids by distillation makes use of their

Density difference

Solubility

Selectivity

Relative volatility

Density difference

Solubility

Selectivity

Relative volatility

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Mass Transfer
If f is defined as above, then which of the following applies to a feed at dew point?

F > 1

0 < f < 1

F < 1

F = 1

F > 1

0 < f < 1

F < 1

F = 1

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Mass Transfer
Boiling point diagram is

Affected by pressure

A plot of temperature vs. liquid composition

Not affected by pressure

A plot of temperature vs. vapour composition

Affected by pressure

A plot of temperature vs. liquid composition

Not affected by pressure

A plot of temperature vs. vapour composition

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Mass Transfer

Mass Transfer When the mixture to be distilled has a very high boiling point and the product material is heat sensitive, the separation technique to be used is __________ distillation.

Mass Transfer As the reflux ratio in a distillation coloumn is increased from the minimum, the

Mass Transfer Separation of two volatile liquids by distillation makes use of their

Mass Transfer If f is defined as above, then which of the following applies to a feed at dew point?

Mass Transfer Boiling point diagram is

Mass Transfer
When the mixture to be distilled has a very high boiling point and the product material is heat sensitive, the separation technique to be used is __________ distillation.

Mass Transfer
As the reflux ratio in a distillation coloumn is increased from the minimum, the

Mass Transfer
Separation of two volatile liquids by distillation makes use of their

Mass Transfer
If f is defined as above, then which of the following applies to a feed at dew point?

Mass Transfer
Boiling point diagram is