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Mass Transfer

Mass Transfer
Degree of freedom for leaching and solvent extraction process is

2
1
3

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Mass Transfer
In which of the following unit operations, the selectivity is an important parameter?

Absorption
None of these
Distillation
Solvent extraction

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Mass Transfer
Desirable value of absorption factor in an absorber is

0.5
1
< 1
> 1

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Mass Transfer
Acetone is to be removed from air in an isothermal dilute absorber using pure water as solvent. The incoming air contains 5 mole% of acetone (yin = 0.05). The design equation to be used for obtaining the number of trays (N) of the absorber is, N+2 = 6 log (yin/yout).For 98% recovery of acetone, the number of trays required is/are

1
9
8
10

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Mass Transfer
In a binary system, separation is very efficient, when the relative volatility is

0.5
> 1
1
< 1

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Mass Transfer
Which of the following assumes constant molal vaporisation and overflow?

Ponchan-Savarit method
Enthalpy concentration method
Plate absorption column
McCabe-Thiele method

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