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Mass Transfer

Mass Transfer
In a binary distillation column, if the feed contains 40 mole % vapour, the q line will have a slope of

-0.6
1.5
-1.5
0.6

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Mass Transfer
Mass transfer co-efficient 'K' according to penetration theory varies with mass dif-fusivity as

D0.5
D
D1.5
1/D

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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
T³
T²
√T

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Mass Transfer
Raschig ring made of procelain cannot be used for treating concentrated

Hydrochloric acid
Alkalis
Nitric acid
Sulphuric acid

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Mass Transfer
The value of Lewis number (Le = Sc/Pr) for air-water vapour system is around

0.24
1
600
3.97

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Mass Transfer
Molecular diffusivity of a liquid

Increases with temperature
Decreases with temperature
May increase or decrease with temperature
Is independent of temperature

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MORE MCQ ON Mass Transfer

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