Question

For an ideal solution with $P _ { A } > P _ { B }$which of the following is true.

• A.
• B. $\left( X _ { A } \right) _ { \text {liquid } } > \left( X _ { A } \right) _ { \text {vapour } }$
• C. $\left( X _ { A } \right) _ { \text {liquid } } < \left( X _ { A } \right) _ { \text {vapour } }$
• D. $\left( X _ { A } \right) _ { \text {liquid } }$ and $\left( X _ { A } \right) _ { \text {vapour } }$ do not bear any relationship with each other.

Answer 1

Answer: (C)

$\left( X _ { A } \right) _ { \text {liquid } } < \left( X _ { A } \right) _ { \text {vapour } }$

Answer 2

As A is more volatile vapor phase would be richer in A. Hence $\left( \mathrm { x } _ { \mathrm { A } } \right) _ { \text {liquid } } < \left( \mathrm { x } _ { \mathrm { A } } \right) _ { \text {vapour } }$