Question

In the graph plotted between vapour pressure (V. P) and temperature $(\Delta T)$

• A. PQ is the curve for solvent , XY is the curve of solution and $\Delta T$ is depression in freezing point
• B. PQ is the curve for solvent XY is the curve for solvent and $\Delta T$ is elevation in boiling point.
• C. PQ is the curve for solvent XY is the curve for solution and is molal elevation in boiling point
• D. PQ is the curve for solvent XY is the curve for solution and $\Delta T$is elevation in boiling point.

Answer 1

Answer: (D)

PQ is the curve for solvent XY is the curve for solution and $\Delta T$is elevation in boiling point.

Answer 2

PQ corresponds to increase in vapour pressure of solvent with temperature and XY, corresponds to increase in vapour pressure of solution with temperature. $\Delta T$ is the elevation in boiling point of a solution.