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Mass Transfer

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

Surface renewal
Penetration
None of these
Film

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Mass Transfer
Leaching of coffee from coffee beans is done by

Hexane
Dilute H₂SO₄ (hot)
Hot water
Lime water

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Mass Transfer
Pressure drop through plate tower as compared to that through packed tower, for the same duty will be

Either A or B; depends on the packing height
More
Equal
Less

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Mass Transfer
Equilibrium-moisture curves of different solids

Are different
Are same
Depend on the humidity of the gas
None of these

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Mass Transfer
In case of unsaturated air

None of the listed here
Wet bulb temperature < dry bulb temperature
Dew point < wet bulb temperature
Both of the options given here

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Mass Transfer
Separation of __________ employs gaseous diffusion process.

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

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