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Mass Transfer

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

Across
Above
Neither A nor B
Both A & B

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Mass Transfer
On moving the feed line (q-line) from saturated liquid feed (vertical position) to saturated vapor feed (horizontal feed), if the slope of both the operating lines are to be increased, then it will result in

Increased reflux ratio
None of these
Greater degree of separation with a fixed number of trays
Increased reboiler load

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Mass Transfer
Binary distillation involves the mass transfer by __________ at the gas-liquid interface.

Either A or B
A counter diffusion at an almost equal molar rate
Unidirectional diffusion from liquid to gas phase
Unidirectional diffusion from gas to liquid phase

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Mass Transfer
To increase the absorption factor, (where, G = gas flow rate, S = solvent flow rate)

Increase both 'G' and 'S'
Decrease both 'G' and 'S'
Increase 'S' and decrease 'G'
Increase 'G' and decrease 'S'

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Mass Transfer
The most common packing used in industrial operations is __________ rings.

Single spiral
Lessing
Cross-partition
Raschig

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Mass Transfer
In liquid extraction, if the selectivity is unity, then

No separation will occur
Amount of solvent required will be minimum
Solvent flow rate should be very low
Separation of the constituents is the most effective

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