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Mass Transfer

Mass Transfer
At what percentage (by volume) of alcohol composition, it forms an azeotrope with water?

99
90
91.5
95

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Mass Transfer
The Schmidt number which is defined as, μ/ρ D, is the ratio of the

Momentum diffusivity to the mass dif-fusivity
Momentum diffusivity to the thermal diffusivity
Thermal diffusivity to the mass diffusivity
None of these

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Mass Transfer
Water entrained by circulating air in cooling towers is termed as

Blow down
None of the listed here
Drift
Vapor load

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Mass Transfer
Absorption factor is defined as (where, S₁ = slope of the operating line S₂ = slope of the equilibrium curve)

S₁ - S₂
S₁/S₂
S₁ x S₂
S₂/S₁

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Mass Transfer
In distillation, overhead product contains

Any number of components
Only saturated liquid
Only one component
Two components

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Mass Transfer
Very tall packed towers are divided into series of beds to

Avoid flooding
Reduce the overall pressure drop
Reduce liquid hold-up
Avoid channelling

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