Question

Mark the correct statements(s) regarding Azeotropes
A. At azeotropic composition, vapour phase composition is same as the liquid phase composition.
B. Water and `HNO_(3)` can form minimum boiling azeotrope.
C. Azeotropes are formed by non-ideal solution.
D. Boiling point of azeotropic solutions does not change while boiling thhe solution at constant external pressure. This bahavious is similar to ideal solution.

Answer 1

Correct Answer - B::C
Water and `HNO_(3)` solution shows negative deviation from raoults law and forms maximum boiling azeotrope at a particular composition. Azeotropes are constant boiling mixtures but boiling point of ideal solution changes while boiling. In ideal solution, vapor phase becomes richer in more volatile component,vapour pressure of remaining solution decreases and hence BP increases continuously while boiling.