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Mass Transfer

Mass Transfer
In liquid-liquid extraction, the number of phases at plait point is

4
2
3
1

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Mass Transfer
Steam distillation is used for separation of high boiling

Substances from non-volatile impurities
none of the listed here
Both of the options given here
Volatile impurity from still higher boiling substances

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Mass Transfer
Total reflux in a distillation operation requires minimum

All of these
Number of plates
Condenser load
Reboiler load

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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

1.94
1.24
1.04
0.54

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Mass Transfer
Operating velocity in a packed tower is usually __________ the flooding velocity.

Half
More than
Equal to
Twice

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Mass Transfer
The vapour pressure exerted by the moisture contained in a wet solid depends upon the

All of these
Temperature
Nature of the solid
Nature of the moisture

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