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Mass Transfer

Mass Transfer
Leaching of coffee from coffee beans is done by

Hexane
Hot water
Lime water
Dilute H₂SO₄ (hot)

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

K ∝ D1.5
K ∝ D2
K ∝ √D
K ∝ D

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Mass Transfer
The equipment frequently used for adiabatic humidification-cooling operation with recirculating liquid is

Induced draft cooling tower
None of these
Natural draft cooling tower
Spray chamber

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Mass Transfer
Molarity is defined as the number of gm moles of solute per __________ of solvent.

Gm
Kg
c
Litre

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Mass Transfer
The individual mass transfer co-efficients (moles/m² . s) for absorption of a solute from a gas mixture into a liquid solvent are, KL = 4.5 and KG = 1.5. The slope of the equilibrium line is 3. Which of the following resistance (s) is (are) controlling ?

Both liquid and gas side
Liquid side
Gas side
Interfacial

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Mass Transfer
Stefan's law describes the mass transfer by

Bulk flow
Both A & B
Diffusion
Neither A nor B

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