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Mass Transfer

Mass Transfer
Alcohol is dehydrated using __________ distillation.

Azeotropic
Extractive
Molecular
Steam

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

D0.5
1/D
D
D1.5

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Mass Transfer
With increase in temperature, the rate of leaching increases, because the

Diffusivity of solute increases
None of these
Viscosity of solvent decreases
Thermal conductivity of solute increases

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Mass Transfer
__________ columns are used for liquid dispersion in a continuous gas phase.

Bubble cap
Packed
Sieve plate
Pulse

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

Vacuum gas oil
HCl
Ethanolamine
K₂CO₃

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Mass Transfer
As the reflux ratio decreases, the

Number of plates increases
Separation becomes more efficient
Column diameter increases
None of these

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