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Mass Transfer

Mass Transfer
Leaching of coarse solid lumps is also termed as

Percolation
Dissolution
Decoction
Agitation and settling

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Mass Transfer
Azeotropic distillation is employed to separate

Heat sensitive materials
Mixture with very high relative volatility
Constant boiling mixture
High boiling mixture

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Mass Transfer
The process employing desorption of the absorbed solute by a solvent is called

Elution
Sublimation
Reverse osmosis
Osmosis

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Mass Transfer
The solvent used in liquid-liquid extraction should have __________ less than one.

Both A & B
Selectivity
Distribution co-efficient
Neither A nor B

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Mass Transfer
According to the Fenske equation, what will be the minimum number of plates required in a distillation column to separate an equimolar binary mixture of components A and B into an overhead fraction containing 99 mol% A and a bottom fraction containing 98 mol% B? Assume that relative volatility (αAB = 2) does not change appreciably in the coloumn.

10
6
8
12

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Mass Transfer
Penetration theory relates the average mass transfer co-efficient (K) with diffusivity (D) as

K ∝ D2
K ∝ √D
K ∝ D
K ∝ D1.5

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