Pick out the wrong statement ?

A. l column, in case of liquid-liquid extraction

B. reases for a given L/V ratio

C. Natural draft cooling towers are made of ferroconcrete and its cross-section is wider at the

D. Vander wall adsorption is also called chemisorption

E. The extraction per unit of total height for a short packed column is more effective than for a

F. With decrease in feed temperature, the number of plates required for binary distillation

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