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MASS TRANSFER

Mass Transfer
If the path of liquid across the plate is very long as in case of large diameter tower, Murphree efficiency can be __________ percent.

< 100
> 100
100
None of these

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Mass Transfer
A binary mixture of benzene and cyclohexane is separated by

Ordinary distillation
Flash vaporisation
Solvent extraction
Extractive distillation

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Mass Transfer
The relative saturation of an unsaturated mixture of gas and vapor is independent of the

Temperature of the mixture
Composition of the mixture
Nature of the vapor
None of these

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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
Which of the following plays an important role in problems of simultaneous heat and mass transfer?

Schmidt number
Sherwood number
Prandtl number
Lewis number

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