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Mass Transfer

Mass Transfer
The-relative volatility for separation of a non-ideal binary mixture by distillation should be

> 1
< 1
1

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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
2
1.56
0.56

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Mass Transfer
Dry bulb temperature of the gas is __________ the wet bulb temperature.

More than
Equal to
Less than
None of these

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Mass Transfer
Removal of __________ exemplifies an adsorption unit operation.

None of the listed here
Ammonia from coke oven gas
Water from petrol
Uranium from its ore

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Mass Transfer
Low viscosity absorbent is preferred for reasons of

All of these
Improved flooding characteristics
Low pressure drop on pumping
Rapid absorption rates and good heat transfer characteristics

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Mass Transfer
Lewis number, which is important in problems involving simultaneous heat and mass transfer, is the ratio of

None of these
Mass diffusivity to momentum diffusivity
Thermal diffusivity to mass diffusivity
Momentum diffusivity to thermal diffusivity

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