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Mass Transfer

Mass Transfer
When the psychometric ratio is __________ then the adiabatic saturation temperature and wet bulb temperature becomes equal.

?
< 1
> 1
1

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Mass Transfer
Desulphurisation of petrol is done in a

Packed extraction column
Bollman extractor
Rotating disc extractor
Plate type extraction column

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Mass Transfer
In extractive distillation, solvent is

Of high viscosity to give high tray efficiency
Added to alter the relative volatility of the mixture
Of high volatility
Present in overhead stream

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Mass Transfer
Percentage saturation is __________ the relative saturation.

None of these
Always greater than
Not related to
Always smaller than

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Mass Transfer
Danckwerts developed the __________ theory.

Film
Penetration
Surface renewal
None of these

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Mass Transfer
H₂S is being absorbed in a gas absorber unit. The height of the transfer unit based on the overall mass transfer coefficient on the gas side is 0.4 m. The equilibrium data is given by, y = 1.5 x. The bulk concentration of H₂S has to be reduced from 0.05 to 0.001 mole fraction in the gas side. The height of the tower (in metres) corresponding to an operating line given by, y = 5x + 0.001 is

0.56
1.56
1
2

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