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Mass Transfer

Mass Transfer
Berl saddle made of carbon cannot be used for

H₂SO₄
SO₂
Oxidising atmosphere
Alkalis

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Mass Transfer
The value of Lewis number (Le = Sc/Pr) for air-water vapour system is around

1
600
3.97
0.24

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

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

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

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

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Mass Transfer
In case of physical adsorption, the difference between heat of adsorption and heat of normal condensation is

Called integral heat of adsorption
Equal to the heat of formation of surface compound
Equal to the heat of wetting
Zero

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Mass Transfer
Separation of a mixture of two gases by absorption in the liquid solvent depends upon the difference in their

Density
Relative volatility
Solubility
Viscosity

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MORE MCQ ON Mass Transfer

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