Question

Intermolecular forces between n- hexane and n- heptanes are nearly same as between hexane and heptanes individually, When these two are mixed, which of the following is not true about the solution formed?

• A. It obeys Raoult’s law, i.e. $\mathrm { P } _ { \mathrm { A } } = \mathrm { x } _ { \mathrm { A } } \mathrm { p } _ { \mathrm { A } } ^ { \mathrm { o } }$ and $\mathrm { P } _ { \mathrm { B } } = \mathrm { x } _ { \mathrm { B } } \mathrm { p } _ { \mathrm { B } } ^ { \mathrm { o } }$
• B. $\Delta H _ { \text {mixing } }$ is zero
• C. $\Delta V _ { \text {mixing } }$ is zero
• D. It forms minimum boiling azeotrope.

Answer 1

Answer: (D)

It forms minimum boiling azeotrope.

Answer 2

Azeotropes are formed by the solutions which show deviations from ideal behavior.