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Mass Transfer

Mass Transfer
Desirable value of absorption factor in an absorber is

1
< 1
0.5
> 1

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Mass Transfer
If a₁ and a₂ are the relative volatilities when the pressure in the distillation column is 1 and 2 atm respectively. Pick out the correct statement.

None of these
a₁ = a₂
a₁ = 2a₂
a₁ = 0.5 a₂

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Mass Transfer
Flooding in a vapor-liquid contacting equipment occurs in a tray, when the pressure drop through a tray is __________ the liquid head available in the downcomer.

Very much less
Less than
More than
Same as

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Mass Transfer
Agitator is provided in a crystalliser for

Crystal growth
Formation of nuclei
All of these
Avoiding deposition on cooler surfaces

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Mass Transfer
Leaching of coarse solid lumps is also termed as

Agitation and settling
Dissolution
Decoction
Percolation

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Mass Transfer
An air-water vapour mixture has a dry bulb temperature of 60°C and a dew point temperature of 40°C. The total pressure is 101.3 kPa and the vapour pressure of water at 40°C and 60°C are 7.30 kPa and 19.91 kPa respectively.The humidity of air sample expressed as kg of water vapour/kg of dry air is

0.152
0.079
0.122
0.048

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