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Mass Transfer

Mass Transfer
The-relative volatility for separation of a non-ideal binary mixture by distillation should be

1
< 1
> 1

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Mass Transfer
The cooling effect in a cooling tower can be speeded up by

Reducing the barometric pressure
Reducing the humidity of the air
Increasing the air velocity and area of exposed wet surface
All of the listed here

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Mass Transfer
______ is the separation technique used for desalination of sea water.

Thermal diffusion
Adsorption
Reverse osmosis
Absorption

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Mass Transfer
In batch distillation with constant reflux, overhead product composition __________ with time.

Decreases
May increase on decrease, depends on the system
Does not vary
Increases

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Mass Transfer
The surface renewal frequency in Danckwerts model of mass transfer is given by (KL: mass transfer co-efficient)

KL/DA²
KL²/DA
KL².DA
√(KL².DA)

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Mass Transfer
Drift in a cooling tower is

All of these
Dependent on the water lost by evaporation
The water entrained by the circulating air
Desirable

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