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Mass Transfer

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

12
2
8
18

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Mass Transfer
Schmidt number is given by

Re.Pe
Μ/ρDAB
Re/Pe
Sh x Pe

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Mass Transfer
As complete saturation of an adsorbent is approached, the differential heat of adsrop-tion approaches

Zero
None of these
Integral heat of adsorption
That of normal condensation

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Mass Transfer
Separation of __________ employs gaseous diffusion process.

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

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Mass Transfer
According to Chilton-Colburn analogy for mass transfer, NSt.NSc2/3 is equal to

F/2
1/f
2f
F

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Mass Transfer
Antibiotics are best handled in a

Rotating disc contactor
Sieve tray contractor
Pulsed column extractor
Podbielniak extractor

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