A. With decrease in feed temperature, the number of plates required for binary distillation
decreases for a given ‘L/V’ ratio
B. The extraction per unit of total height for a short packed column is more effective than for a
tall column, in case of liquid-liquid extraction
C. Natural draft cooling towers are made of ferroconcrete and its cross-section is wider at the
bottom
D. Vander wall adsorption is also called chemisorption

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