Saleha Pervez and Vandana Solutions for Chapter: Solutions, Exercise 5: Chapter Practice

Why does a solution of chloroform and acetone show negative deviation from Raoult's law?

State how the vapour pressure of a solvent is affected, when a non-volatile solute is dissolved in it?

A solution of glucose $\left({\mathrm{C}}_6{\mathrm{H}}_{12}{\mathrm{O}}_6\right)$ in water is labeled as $10\%$ by weight. What would be the molality of the solution? ( Molar mass of glucose$=180 \mathrm{g} {\mathrm{mol}}^{-1}$)

Two liquids $\mathrm{X}$ and $\mathrm{Y}$ boil at $100° \mathrm{C}$ and $120° \mathrm{C}$ respectively. Which of them has a higher vapour pressure at $50° \mathrm{C}$ and why?

Calculate the boiling point of a solution prepared by adding $15.00 \mathrm{g}$ of $\mathrm{NaCl}$ to $250 \mathrm{g}$ water. (${\mathrm{K}}_{\mathrm{b}}$ for water $=0.512 \mathrm{K} \mathrm{Kg} {\mathrm{mol}}^{-1}$, molar mass of $\mathrm{NaCl}=58.44 \mathrm{g}$)

Calculate the lowering of vapour pressure for an aqueous solution of non-electrolyte at $75° \mathrm{C}$. ( $∆\mathrm{H}=9.720 \mathrm{K} \mathrm{cal} {\mathrm{mol}}^{-1}, {\mathrm{p}}_2=742.96 \mathrm{torr}$) 

What is Van't Hoff factor?

What possible value can it have if the solute molecules undergo dissociation?