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Mass Transfer

Mass Transfer
What is the reflux ratio at total reflux?

Data insufficient
Unity
Zero
Infinity

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Mass Transfer
As the reflux ratio, in a continuous counter-current extraction is increased, the number of stages

Increase
Remain unchanged
Decrease
Can either increase or decrease, depends on the system

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Mass Transfer
Separation of __________ employs gaseous diffusion process.

Isotopes of uranium
N₂ and O₂ from air
Isotopes of helium
SO₂ and air

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Mass Transfer
Which of the following decreases during evaporative cooling process with recirculated water supply?

None of these
Partial pressure of vapour
Relative humidity
Wet bulb temperature

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Mass Transfer
The slope of the operating line for a single component co-current absorber when plotted in terms of mole ratio units is

+ve
-ve
∞

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Mass Transfer
Flooding in a vapor-liquid contacting equipment occurs in a tray, when the pressure drop through a tray is __________ the liquid head available in the downcomer.

Same as
Less than
More than
Very much less

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