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Mass Transfer

Mass Transfer
Desirable value of absorption factor in an absorber is

1
> 1
0.5
< 1

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Mass Transfer
If Rm is the minimum reflux ratio, the optimum reflux ratio may be around __________ Rm.

2.5 to 3
3 to 4
1.2 to 1.5
5

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Mass Transfer
Reboiler is considered as one theoretical plate, because

Vapour is recycled to the column
Of the assumption that vapour and liquid leaving the reboiler are in equilibrium
None of these
Reboiler itself contains one plate

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Mass Transfer
In case of an ideal solution, the total vapor pressure varies __________ with the composition expressed as mole fraction,

Inversely
Exponentially
Linearly
None of these

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Mass Transfer
With increase in the mass velocity of the gas, the rate of drying during the constant rate period __________ , if the conduction and radiation through the solid are negligible.

Remains same
Decreases
Increases linearly
Increases

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Mass Transfer
With increase in pressure, the relative volatility for a binary system

Increases
Remains same
Decreases
Either A or B, depends on the system

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