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Mass Transfer

Mass Transfer
Pore size of the molecular seive 5A is __________ mm.

50
0.05
0.5
5

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Mass Transfer
Sticky material can be dried in a __________ dryer.

Fluidised bed
None of these
Tray
Rotary

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Mass Transfer
H₂S is being absorbed in a gas absorber unit. The height of the transfer unit based on the overall mass transfer coefficient on the gas side is 0.4 m. The equilibrium data is given by, y = 1.5 x. The bulk concentration of H₂S has to be reduced from 0.05 to 0.001 mole fraction in the gas side. The height of the tower (in metres) corresponding to an operating line given by, y = 5x + 0.001 is

1
1.56
2
0.56

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Mass Transfer
In case of liquid-liquid binary diffusion, diffusivity of one constituent into another is not dependent on the

Temperature and pressure
None of these
Nature of the constituents
Concentration

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Mass Transfer
The unit of volumetric diffusivity is

Cm²/sec
Cm²/seC₂
Cm/sec
Cm³/sec

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Mass Transfer
Fenske equation determines the

Optimum reflux ratio
Height of the distillation column
Maximum number of ideal plates
Minimum number of theoretical plates

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