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Mass Transfer

Mass Transfer
During drying operation, it is easier to remove the __________ moisture.

Unbound
Bound
Equilibrium
Critical

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Mass Transfer
The individual mass transfer co-efficients (moles/m² . s) for absorption of a solute from a gas mixture into a liquid solvent are, KL = 4.5 and KG = 1.5. The slope of the equilibrium line is 3. Which of the following resistance (s) is (are) controlling ?

Both liquid and gas side
Liquid side
Gas side
Interfacial

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Mass Transfer
Absorption accompanied by heat evolution results in

Increased capacity of the absorber
None of these
Increase in equilibrium solubility
Decrease in equilibrium solubility

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Mass Transfer
Perforated plate towers are unique for solvent extraction because, they provide

Repeated coalescence & redispersion of the drop phase
None of these
Higher contact area
Better contact of the phase

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Mass Transfer
The main reason for dividing a tall packed tower into series of small towers is to

Avoid flooding
Avoid channeling
Reduce liquid hold up
Minimise the overall pressure drop

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Mass Transfer
Which of the following remains constant during sensible cooling process ?

Specific humidity
None of the listed here
Specific humidity & Partial pressure of vapour
Partial pressure of vapour

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