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Mass Transfer

Mass Transfer
Surface renewal model of mass transfer was enunciated by

Stefan
Danckwerts
Fick
Toor and Marchello

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Mass Transfer
__________ is concerned with the adsorption equilibria.

Gibb's equation
Freundlich equation
Fick's law
None of these

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

Tray
Rotary
Fluidised bed
None of these

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Mass Transfer
The expression, y(1 - x)/x(1 - y) is for

Murphree efficiency
Absorption factor
Relative volatility
Selectivity

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Mass Transfer
In case of absorption, both the operating and equilibrium lines will be straight for

Dilute solutions
Isothermal operation
Dilute solutions and isothermal operation
None of these

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Mass Transfer
Penetration theory states that the mass transfer co-coefficient is equal to (where, De is diffusivity and 't' is time)

(De/t)1/2
(4De/πt)1/2
(4De/t)
(De.t)1/2

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