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Mass Transfer

Mass Transfer
In a binary system, separation is very efficient, when the relative volatility is

< 1
0.5
1
> 1

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Mass Transfer
Mass transfer co-efficient varies as DAB0.5, according to the __________ theory.

Film
None of these
Surface renewal
Penetration

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Mass Transfer
During sensible cooling process

Both B and C
Wet bulb temperature decreases
Relative humidity decreases
Relative humidity increases

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Mass Transfer
Absorption factor method is used to calculate the number of ideal stages, when

Pressure drop in the column is very high
Both operating and equilibrium lines are parallel
Operating line lies above the equilibrium line
Operating line lies below the equilibrium line

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Mass Transfer
In extraction, as the temperature increases, the area of hetrogeneity (area covered by binodal curve)

Decreases
Increases
Remains unchanged
None of these

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Mass Transfer
Reboiler is considered as one theoretical plate, because

Vapour is recycled to the column
None of these
Reboiler itself contains one plate
Of the assumption that vapour and liquid leaving the reboiler are in equilibrium

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