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Mass Transfer

Mass Transfer
Prandtl number for water at 20°C is about

0.7
150
70
7

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Mass Transfer
Can the efficiency of a plate in the distillation tower be greater than 100%?

Never
Yes
Normally not; but is possible if infinite number of plates are put
Yes ; if the reflux ratio is maximum

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Mass Transfer
H₂S present in naphtha reformed gas is removed by absorbing with

Vacuum gas oil
K₂CO₃
HCl
Ethanolamine

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Mass Transfer
The Kundsen diffusivity is proportional to (where, T = absolute temperature)

T²
T⁴
T
√T

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Mass Transfer
Molality is defined as the number of gm moles of solute per __________ of solvent.

m³
Gm
Litre
Kg

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Mass Transfer
The efficiency of a plate column will be maximum, when the flow is ideal __________ the plate.

Across
Neither A nor B
Both A & B
Above

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