Pick out the wrong statement.
A. Critical moisture content is not a property of the material itself
B. A sharp increase in pressure drop gives an indication of the flooding in a distillation column
C. Separation of components is not possible in liquid extraction, if selectivity is unity
D. Dehydration of ethyl alcohol is most economically done by molecular distillation at very high vacuum
Answer: Option D
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Flooding is indicated by sharp pressure drop so i think option is B