For the gas absorption, the height of a transfer unit, based on the gas phase is given by (G: superficial molar gas velocity, L: superficial molar liquid velocity, FG:mass transfer co-efficient, mols/m² , a: in-terfacial area per unit volume of tower)

Mass Transfer
For the gas absorption, the height of a transfer unit, based on the gas phase is given by (G: superficial molar gas velocity, L: superficial molar liquid velocity, FG:mass transfer co-efficient, mols/m² , a: in-terfacial area per unit volume of tower)

FG/(G.a)

F/(FG.a)

L/(FG.G)

(G.a)/FG

FG/(G.a)

F/(FG.a)

L/(FG.G)

(G.a)/FG

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Mass Transfer
The rough value of diffusion co-efficient of water vapor into air at 25°C may be about __________ cm²/sec.

1.25

0.25

2.5

0.0025

1.25

0.25

2.5

0.0025

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Mass Transfer
Absorption accompanied with chemical reaction is exemplified by the absorption of

Benzol present in coke oven gas by wash oil

All of these

Ammonia in water

SO₂ in alkaline solution

Benzol present in coke oven gas by wash oil

All of these

Ammonia in water

SO₂ in alkaline solution

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Mass Transfer
Flights in a rotary dryer are provided to

None of these

Increase the residence time of the solid

Reduce the residence time of solid

Lift and shower the solids thus exposing it thoroughly to the drying action of the gas

None of these

Increase the residence time of the solid

Reduce the residence time of solid

Lift and shower the solids thus exposing it thoroughly to the drying action of the gas

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Mass Transfer
The temperature to which a vapour gas mixture must be cooled (at varying humidity) to become saturated is called the __________ temperature.

Dew point

Wet bulb

None of these

Dry bulb

Dew point

Wet bulb

None of these

Dry bulb

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Mass Transfer
Swenson-Walker crystalliser is a __________ unit

Semi-batch

Continuous

Cooling (adiabatic)-cum-evaporation

Batch

Semi-batch

Continuous

Cooling (adiabatic)-cum-evaporation

Batch

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Mass Transfer

Mass Transfer For the gas absorption, the height of a transfer unit, based on the gas phase is given by (G: superficial molar gas velocity, L: superficial molar liquid velocity, FG:mass transfer co-efficient, mols/m² , a: in-terfacial area per unit volume of tower)

Mass Transfer The rough value of diffusion co-efficient of water vapor into air at 25°C may be about __________ cm²/sec.

Mass Transfer Absorption accompanied with chemical reaction is exemplified by the absorption of

Mass Transfer Flights in a rotary dryer are provided to

Mass Transfer The temperature to which a vapour gas mixture must be cooled (at varying humidity) to become saturated is called the __________ temperature.

Mass Transfer Swenson-Walker crystalliser is a __________ unit

Mass Transfer
For the gas absorption, the height of a transfer unit, based on the gas phase is given by (G: superficial molar gas velocity, L: superficial molar liquid velocity, FG:mass transfer co-efficient, mols/m² , a: in-terfacial area per unit volume of tower)

Mass Transfer
The rough value of diffusion co-efficient of water vapor into air at 25°C may be about __________ cm²/sec.

Mass Transfer
Absorption accompanied with chemical reaction is exemplified by the absorption of

Mass Transfer
Flights in a rotary dryer are provided to

Mass Transfer
The temperature to which a vapour gas mixture must be cooled (at varying humidity) to become saturated is called the __________ temperature.

Mass Transfer
Swenson-Walker crystalliser is a __________ unit