Which of the following statements is/are true about an azeotropic mixture? (a) An azeotropic mix...

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Which of the following statements is/are true about an azeotropic mixture?
(a) An azeotropic mixture boils at constant temperature.
(b) The composition of an azeotropic mixture changes on distillation.
(c) An azeotropic solution of two liquids has a boiling point lower than that of either of them when it shows positive deviation from Raoults law.
(d) An azeotropic solution of two liquids has a boiling point higher than that of either of them if it shows positive deviation from Raoults law.
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