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Mass Transfer

Mass Transfer
According to Poiseuille's law, the permeability for gas flow through a capillary is proportional to (where, μ = gas viscosity)

√μ
μ²
μ
1/μ

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Mass Transfer
Leaching of uranium ore and gold ore is done in

Centrifugal extractor
Bollman extractor
None of these
Pachuka tanks

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Mass Transfer
Out of the following gas-liquid contacting devices, for a given set of operating conditions, gas pressure drop is the least in __________ tower.

Perforated tray
Wetted wall
Bubble cap
Packed

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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 ?

Interfacial
Gas side
Liquid side
Both liquid and gas side

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Mass Transfer
Nitrobenzene (boiling point = 210.6°C) is steam distilled at 1 atm pressure.Nitrobenzene will distill off __________ °C.

At < 100
At > 210.6
Between 100 and 210
None of the listed here

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Mass Transfer
When both the fluids flow concurrently in an absorber, the slope of the operating line is

+ ve
- ve
1
-1

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