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Mass Transfer

Mass Transfer
When the feed to a distillation column is a saturated liquid, slope of the feed line is

Infinity
None of these
Unity
Zero

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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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Mass Transfer
During constant rate period, the rate of drying decreases with the

Increase in air humidity
Decrease in air temperature
Both A & B
Neither A nor B

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Mass Transfer
The percentage humidity is less than the relative humidity only at __________ percent humidity.

None of these
Hundred
Both zero and hundred
Zero

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Mass Transfer
High pressure at the bottom of a distillation tower handling heat sensitive materials results in

Very efficient operation
Erosion of the tower
Thermal decomposition of bottoms
Increased relative volatility

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Mass Transfer
Unit of molal diffusivity is

Gm moles/cm. sec
Gm moles/cm². sec
Cm²/sec gm . mole
Gm moles/cm² . sec

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