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Mass Transfer

Mass Transfer
Operating velocity in a packed tower is usually __________ the flooding velocity.

Equal to
Half
More than
Twice

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Mass Transfer
Mass transfer co-efficient varies as DAB0.5, according to the __________ theory.

None of these
Film
Penetration
Surface renewal

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Mass Transfer
In case of an ideal solution, the total vapor pressure varies __________ with the composition expressed as mole fraction,

Exponentially
None of these
Inversely
Linearly

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Mass Transfer
Fenske-Underwood equation used for calculating the minimum number of theoretical plates in distillation column is valid for

All of these
Constant molal overflow
Constant relative volatility
Total reflux

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Mass Transfer
__________ column is preferred to be used, when a high liquid hold up is required in a reactor for gas-liquid reaction.

Bubble
Spray
Tray
Packed

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Mass Transfer
At minimum reflux ratio for a given separation

Number of plates is infinity
Separation is most efficient
Number of plates is zero
Minimum number of the theoretical plates is required

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