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
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

1.04

1.24

0.54

1.94

1.04

1.24

0.54

1.94

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Mass Transfer
Which of the following increases during evaporative cooling process with recirculated water supply?

Both B and C

Wet bulb temperature

Partial pressure of vapour

Relative humidity

Both B and C

Wet bulb temperature

Partial pressure of vapour

Relative humidity

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Mass Transfer
The fixed cost of a distillation column at minimum reflux ratio is

None of these

Optimum

Infinite

Minimum

None of these

Optimum

Infinite

Minimum

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Mass Transfer
According to Chilton-Colburn analogy for mass transfer, NSt.NSc2/3 is equal to

1/f

F

2f

F/2

1/f

F

2f

F/2

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Mass Transfer
In a packed absorption tower, if the equilibrium and operating lines are both straight lines, then the ratio, HETP/HTUOG __________ the absorption factor.

Neither A nor B

Both A and B

Is one at unity value of

Increases with increase in

Neither A nor B

Both A and B

Is one at unity value of

Increases with increase in

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Mass Transfer
If the solubilities of different components (in a liquid-liquid extraction system) increase with rise in temperature, then the temperature above which they dissolve completely is known as the critical solution temperature (CST or consolute temperature). If solubilities increase with decrease in temperature, then CST is the temperature below which they dissolve completely. If a binary system has no critical solution temperature, it implies that

The system comprises of partially mis-cible liquids

The system comprises of miscible liquids

On heating, a vapor phase will appear ; while on cooling, a solid phase will appear

The system comprises of an azeotrope

The system comprises of partially mis-cible liquids

The system comprises of miscible liquids

On heating, a vapor phase will appear ; while on cooling, a solid phase will appear

The system comprises of an azeotrope

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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 Which of the following increases during evaporative cooling process with recirculated water supply?

Mass Transfer The fixed cost of a distillation column at minimum reflux ratio is

Mass Transfer According to Chilton-Colburn analogy for mass transfer, NSt.NSc2/3 is equal to

Mass Transfer In a packed absorption tower, if the equilibrium and operating lines are both straight lines, then the ratio, HETP/HTUOG __________ the absorption factor.

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
Which of the following increases during evaporative cooling process with recirculated water supply?

Mass Transfer
The fixed cost of a distillation column at minimum reflux ratio is

Mass Transfer
According to Chilton-Colburn analogy for mass transfer, NSt.NSc2/3 is equal to

Mass Transfer
In a packed absorption tower, if the equilibrium and operating lines are both straight lines, then the ratio, HETP/HTUOG __________ the absorption factor.