Question

Intermolecular forces between $n$-hexane and $n$-heptane are nearly same as between hexane and heptane 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. $p_{A} = x_{A}p^{\circ}_{A}$ and $p_{B} = x_{B}p^{\circ}_{B}$
• B. $\Delta H_{mixing}$ is zero
• C. $\Delta V_{mixing}$ is zero
• D. It forms minimum boiling azeotrope

Answer 1

Answer: (D)

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