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Mass Transfer

Mass Transfer
If moisture content of solid on dry basis is X, then the same on wet basis is

(X + 1)/X
X/(X - 1)
(X - 1)/X
X/(X + 1)

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Mass Transfer
With increase in gas rate, the number of transfer units, NtoG, for a fixed degree of absorption by a fixed amount of solvent

Decreases linearly
Increases
Remains unaffected
Decreases

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Mass Transfer
Which of the following provides maximum contact surface for a liquid-vapour system?

Bubble-cap plate column
Wetted wall column
Seive-plate column
Packed tower

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Mass Transfer
Flooding in a column results due to

Low pressure drop
Low velocity of the liquid
High pressure drop
High temperature

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Mass Transfer
For turbulent mass transfer in pipes, the Sherwood number depends on the Reynolds number as

Re0.83
Re0.53
Re0.33
Re

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Mass Transfer
Nitrobenzene (boiling point = 210.6°C) is steam distilled at 1 atm pressure.Nitrobenzene will distill off __________ °C.

None of the listed here
Between 100 and 210
At < 100
At > 210.6

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