Mass Transfer
According to the Fenske equation, what will be the minimum number of plates required in a distillation column to separate an equimolar binary mixture of components A and B into an overhead fraction containing 99 mol% A and a bottom fraction containing 98 mol% B? Assume that relative volatility (αAB = 2) does not change appreciably in the coloumn.

6
10
12
8

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Mass Transfer
Channelling is most severe

In dumped packing of regular units
At very high liquid flow rate
In towers packed randomly with crushed solids
In towers packed with stacked packing

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