• (A) Ponchan-Savarit method is more accurate than McCabe-Thiele method to determine the number of theoretical stages required for the separation of non-ideal binary system by distillation
• (B) A sharp decrease in pressure drop is an indication of flooding in a distillation coloumn
• (C) Solvent used in extractive distillation should be of high volatility
• (D) Flash distillation is suitable for separating components which have very close boiling temperature