When the liquid phase and vapour phase of a binary system obeys Raoult's and Dalton's law respectively, the relative volatility is the ratio of

Mass Transfer
When the liquid phase and vapour phase of a binary system obeys Raoult's and Dalton's law respectively, the relative volatility is the ratio of

Vapour pressure of component A to the partial pressure of A

Partial pressure of component A to the total pressure

Vapour pressure of component A to that of component B

Vapour pressure of component A to the total pressure

Vapour pressure of component A to the partial pressure of A

Partial pressure of component A to the total pressure

Vapour pressure of component A to that of component B

Vapour pressure of component A to the total pressure

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Mass Transfer
If mass diffusivity in a mixture is equal to the thermal diffusivity, then the Lewis number is

1

> 1

< 1

1

> 1

< 1

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Mass Transfer
Low viscosity absorbent is preferred for reasons of

All of these

Low pressure drop on pumping

Rapid absorption rates and good heat transfer characteristics

Improved flooding characteristics

All of these

Low pressure drop on pumping

Rapid absorption rates and good heat transfer characteristics

Improved flooding characteristics

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Mass Transfer
A mixture of 10% C₆H₆ vapour in air at 25°C and 750 mm Hg has a dew point of 20°C. Its dew point at 30°C and 700 mm Hg will be around __________ °C.

18.7

27.3

20

21.7

18.7

27.3

20

21.7

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Mass Transfer
In case of __________ distillation, a solvent is added to alter the relative volatility of the mixture to be separated.

Extractive

Molecular

Flash

Azeotropic

Extractive

Molecular

Flash

Azeotropic

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Mass Transfer
Compound A is extracted from a solution of A + B into a pure solvent S. A Co-current unit is used for the liquid-liquid extraction. The inlet rate of the solution containing A is 200 moles of B/hr.m² and the solvent flow, rate is 400 moles of S/m². hr. The equilibrium data is represented by Y = 3X² , where Y is in moles of a A/moles of B and X is in moles A/moles of S. The maximum percentage extraction achieved in the unit is

0.9

0.7

0.5

0.25

0.9

0.7

0.5

0.25

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Mass Transfer

Mass Transfer When the liquid phase and vapour phase of a binary system obeys Raoult's and Dalton's law respectively, the relative volatility is the ratio of

Mass Transfer If mass diffusivity in a mixture is equal to the thermal diffusivity, then the Lewis number is

Mass Transfer Low viscosity absorbent is preferred for reasons of

Mass Transfer A mixture of 10% C₆H₆ vapour in air at 25°C and 750 mm Hg has a dew point of 20°C. Its dew point at 30°C and 700 mm Hg will be around __________ °C.

Mass Transfer In case of __________ distillation, a solvent is added to alter the relative volatility of the mixture to be separated.

Mass Transfer
When the liquid phase and vapour phase of a binary system obeys Raoult's and Dalton's law respectively, the relative volatility is the ratio of

Mass Transfer
If mass diffusivity in a mixture is equal to the thermal diffusivity, then the Lewis number is

Mass Transfer
Low viscosity absorbent is preferred for reasons of

Mass Transfer
A mixture of 10% C₆H₆ vapour in air at 25°C and 750 mm Hg has a dew point of 20°C. Its dew point at 30°C and 700 mm Hg will be around __________ °C.

Mass Transfer
In case of __________ distillation, a solvent is added to alter the relative volatility of the mixture to be separated.