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Mass Transfer

Mass Transfer
The unit of volumetric diffusivity is

Cm³/sec
Cm²/sec
Cm/sec
Cm²/seC₂

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

Unity
Infinity
Zero
None of these

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Mass Transfer
The reciprocal of stripping factor is termed as

Selectivity index
Relative volatility
Absorption factor
Murphree efficiency

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Mass Transfer
In case of unsaturated air

Wet bulb temperature < dry bulb temperature
None of the listed here
Both of the options given here
Dew point < wet bulb temperature

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

Optimum
Minimum
Infinite
None of these

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Mass Transfer
During the constant rate period of drying of a solid,

Surface evaporation of unbound moisture occurs
Increasing the air temperature decreases the drying rate
None of these
Increased air humidity decreases the rate of drying

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