What is the difference between an azeotropic mixture and a near azeotropic mixture? a. An azeotropic mixture has a constant boiling point, while a near azeotropic mixture has a slightly variable boiling point. b. An azeotropic mixture has a fixed composition, while a near azeotropic mixture has a slightly variable composition. c. An azeotropic mixture forms a single phase, while a near azeotropic mixture can form multiple phases. d. An azeotropic mixture exhibits maximum vapor pressure, while a near azeotropic mixture exhibits slightly lower vapor pressure. e. An azeotropic mixture cannot be further separated by simple distillation, while a near azeotropic mixture can be partially separated.