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Mass Transfer

Mass Transfer
Berl saddle made of carbon cannot be used for

Oxidising atmosphere
SO₂
H₂SO₄
Alkalis

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Mass Transfer
The drying time between fixed moisture content within diffusion controlled 'falling rate period' is proportional to (assuming that drying occurs from all surfaces of the solid) (where, T = thickness of the solid )

√T
T²
T
T³

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Mass Transfer
At 750°K and 1 atm, the approximate value of Schmidt number for air is

0.01
1
10
0.1

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Mass Transfer
The individual mass transfer co-efficients (moles/m² . s) for absorption of a solute from a gas mixture into a liquid solvent are, KL = 4.5 and KG = 1.5. The slope of the equilibrium line is 3. Which of the following resistance (s) is (are) controlling ?

Liquid side
Interfacial
Gas side
Both liquid and gas side

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

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

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Mass Transfer
In a solution containing 0.30 Kg mole of solute and 600 kg of solvent, the molality is

2
0.6
0.5
1

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