H₂S is being absorbed in a gas absorber unit. The height of the transfer unit based on the overall mass transfer coefficient on the gas side is 0.4 m. The equilibrium data is given by, y = 1.5 x. The bulk concentration of H₂S has to be reduced from 0.05 to 0.001 mole fraction in the gas side. The height of the tower (in metres) corresponding to an operating line given by, y = 5x + 0.001 is

Mass Transfer
H₂S is being absorbed in a gas absorber unit. The height of the transfer unit based on the overall mass transfer coefficient on the gas side is 0.4 m. The equilibrium data is given by, y = 1.5 x. The bulk concentration of H₂S has to be reduced from 0.05 to 0.001 mole fraction in the gas side. The height of the tower (in metres) corresponding to an operating line given by, y = 5x + 0.001 is

2

1

1.56

0.56

2

1

1.56

0.56

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Mass Transfer
A pure drug is administered as a sphere and as a cube. The amount of drug is the same in the two tablets. Assuming that the shape and size do not influence the mass transfer, the ratio of rate of dissolution in water at t = 0 for the cubic to spherical tablet is

0.54

1.94

1.04

1.24

0.54

1.94

1.04

1.24

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Mass Transfer
Diffusion in concentrated solutins differs from that in dilute solutions, because of the change in the __________ with the concentration of the solution.

Degree of ideality

Both A & B

Neither A nor B

Viscosity

Degree of ideality

Both A & B

Neither A nor B

Viscosity

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Mass Transfer
Pick out the correct relationship. (where, Ri = internal reflux ratio Ro = external reflux ratio. )

(1 - Ri) = Ro/Ri

(1 + Ro) = Ro/Ri

(1 + Ri) = Ro/Ri

(1 - Ro) = Ro/Ri

(1 - Ri) = Ro/Ri

(1 + Ro) = Ro/Ri

(1 + Ri) = Ro/Ri

(1 - Ro) = Ro/Ri

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Mass Transfer
Stacked packing compared to dumped packing

Provides poorer contact between the fluids

Both A & B

Gives higher pressure drop

Gives lower pressure drop

Provides poorer contact between the fluids

Both A & B

Gives higher pressure drop

Gives lower pressure drop

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Mass Transfer
Components, having widely different boiling point in a binary mixture, can be separated using __________ distillation.

Simple

Steam

Molecular

Extractive

Simple

Steam

Molecular

Extractive

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Mass Transfer

Mass Transfer A pure drug is administered as a sphere and as a cube. The amount of drug is the same in the two tablets. Assuming that the shape and size do not influence the mass transfer, the ratio of rate of dissolution in water at t = 0 for the cubic to spherical tablet is

Mass Transfer Diffusion in concentrated solutins differs from that in dilute solutions, because of the change in the __________ with the concentration of the solution.

Mass Transfer Pick out the correct relationship. (where, Ri = internal reflux ratio Ro = external reflux ratio. )

Mass Transfer Stacked packing compared to dumped packing

Mass Transfer Components, having widely different boiling point in a binary mixture, can be separated using __________ distillation.

Mass Transfer
A pure drug is administered as a sphere and as a cube. The amount of drug is the same in the two tablets. Assuming that the shape and size do not influence the mass transfer, the ratio of rate of dissolution in water at t = 0 for the cubic to spherical tablet is

Mass Transfer
Diffusion in concentrated solutins differs from that in dilute solutions, because of the change in the __________ with the concentration of the solution.

Mass Transfer
Pick out the correct relationship. (where, Ri = internal reflux ratio Ro = external reflux ratio. )

Mass Transfer
Stacked packing compared to dumped packing

Mass Transfer
Components, having widely different boiling point in a binary mixture, can be separated using __________ distillation.