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Mass Transfer

Mass Transfer
Leaching of coffee from coffee beans is done by

Lime water
Hexane
Dilute H₂SO₄ (hot)
Hot water

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Mass Transfer
In a packed tower, the value of HETP equals HTUOG, when the equilibrium and the operating lines are (where, HETP = height equivalant to a theoretical plate HTUOG = overall gas phase height of a transfer unit)

Both A & B
Parallel
Straight
Neither A nor B

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Mass Transfer
The wet and 'dry bulb temperature for a vapour-gas mixture are 25°C and 30°C respectively. If the mixture is heated to 45°C at constant pressure, the wet bulb temperature will be __________ °C.

-25
25
> 25
< 25

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Mass Transfer
An azeotropic mixture is a __________ mixture.

Binary
Constant boiling point
Ternary
None of these

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Mass Transfer
The dew point of an unsaturated gas-vapor mixture does not depend upon the __________ of the mixture.

All of these
Temperature
Total pressure
Composition

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Mass Transfer
Absorption factor is defined as (where, S₁ = slope of the operating line S₂ = slope of the equilibrium curve)

S₁ - S₂
S₂/S₁
S₁/S₂
S₁ x S₂

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