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Mass Transfer

Mass Transfer
Which of the following adsorbent is used to decolourise yellow glycerine?

Alumina
Fuller
Silica gel
Activated carbon

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Mass Transfer
The value of L/mG ratio for economical absorption operation ranges from

2.5 to 3.5
0.8 to 1.2
1.25 to 2.0
0.5 to 0.8

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Mass Transfer
For a distillation column operating at minimum reflux, the

Number of plates required will be maximum
None of these
Reflux ratio will be maximum
Concentration of liquid and vapour leaving a plate will be same

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Mass Transfer
Berl saddle made of carbon cannot be used for

Alkalis
H₂SO₄
Oxidising atmosphere
SO₂

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Mass Transfer
For which of the following unit operations, Lewis number is of significance?

Adsorption
Gas absorption
Humidification
Binary distillation

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Mass Transfer
Unit of molal diffusivity is

Cm²/sec gm . mole
Gm moles/cm. sec
Gm moles/cm² . sec
Gm moles/cm². sec

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