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Mass Transfer

Mass Transfer
Leaching of coffee from coffee beans is done by

Hexane
Lime water
Hot water
Dilute H₂SO₄ (hot)

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

Less than
None of these
More than
Equal to

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Mass Transfer
At the same gas flow rate, the pressure drop in a packed tower being irrigated with liquid __________ that in dry packed tower.

Is greater than
Is same as
Is lower than
Cannot be predicted as data are insufficient

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Mass Transfer
In case of constant underflow extraction operation, the __________ at all solute concentration.

Solids are drained to the same extent
Neither A nor B
Ratio of the insoluble to solution is constant
Both A & B

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Mass Transfer
All moisture in a non-hygroscopic material is the __________ moisture.

Bound
Free
Unbound
Equilibrium

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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
(De.t)1/2
(4De/πt)1/2
(4De/t)

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