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Mass Transfer

Mass Transfer
In liquid-liquid extraction, the number of phases at plait point is

3
4
1
2

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Mass Transfer
Which of the following is not a continuous leaching equipment?

Hydrocyclones
Bollman extractor
Pachuka tank
Kennedy extractor

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Mass Transfer
The relative volatility of a binary mixture at constant temperature __________ the total pressure.

Increases with increase in
None of these
Is independent of
Decreases with increase in

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Mass Transfer
Can the efficiency of a plate in the distillation tower be greater than 100%?

Yes ; if the reflux ratio is maximum
Yes
Normally not; but is possible if infinite number of plates are put
Never

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Mass Transfer
Diameter of raschig rings used in packed tower in industry is normally around __________ inches.

2
18
12
8

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Mass Transfer
In a forced draft cooling tower, water is cooled from 95 to 80°F by exposure to air with a wet bulb temperature of 70°F. In this case, the

Range is 15°F
Neither A nor B
Both A & B
Approach is 10°F

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