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Mass Transfer

Mass Transfer
Weight of 1 m³ of humid air as compared to 1 m³ of dry air, under the same conditions, is

More
Less
Same
Unpredictable

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Mass Transfer
Which of the following unit operations makes use of Thiele-Geddes equation?

Multicomponent distillation
Liquid-liquid extraction
Multicomponent absorption with chemical reaction
Solid-liquid extraction

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Mass Transfer
If mass diffusivity in a mixture is equal to the thermal diffusivity, then the Lewis number is

> 1
1
< 1

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Mass Transfer
Chemisorption (chemical adsorption) is

A reversible phenomenon
An irreversible phenomenon
Same as "Van der Waals" adsorption
Characterised by adsorption of heat

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Mass Transfer
Deairation (removal of O₂) of water is done by

Absorption
Adsorption
Ion-exchange
Rectification

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Mass Transfer
Which of the following processes is followed by unsaturated air (with dry bulb temperature 12°C and relative humidity 47%) passing through water spray washer (temperature of water being constant at 40°C?

Evaporative cooling
Both heating and humidification
Heating only
Humidification only

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