Prof. Anil Thomas and Prof. Santosh Yadav Solutions for Chapter: Solutions and Colligative Properties, Exercise 3: Competitive Thinking

Van't Hoff factor of centimolal solution of ${\text{K}}_{\text{3}}{\text{[Fe(CN)}}_{\text{6}}\text{]}$ is $3.333$. Calculate the percent dissociation of ${\text{K}}_{\text{3}}{\text{[Fe(CN)}}_{\text{6}}\text{]}$.

The freezing point of benzene decreases by $0.45°\mathrm{C}$ when $0.2 \mathrm{g}$ of acetic acid is added to $20 \mathrm{g}$ of benzene. If acetic acid associates form a dimer in benzene, percentage association of acetic acid in benzene will be _____. (${\text{K}}_{\text{f}}\text{ for benzene=5.12 K kg/mol}$)

$0.06\% (\mathrm{w}/\mathrm{v})$ aqueous solution of urea is isotonic with _____.

The Van't Hoff factor of benzoic acid solution in benzene is $0.5$. In this solution, benzoic acid _______.

Pure water can be obtained from seawater by _____.

What is the mass of the precipitate formed when $50 \mathrm{mL}$ of $17.0 \% \left(\mathrm{w}/\mathrm{v}\right)$ solution of ${\mathrm{AgNO}}_{\mathrm{3}}$ is mixed with $50 \mathrm{mL}$ of $5.85\% \left(\mathrm{w}/\mathrm{v}\right)$ $\mathrm{NaCl}$ solution?

$(\mathrm{Ag}=108, \mathrm{N}=14, \mathrm{O}=16, \mathrm{Na}=23, \mathrm{Cl}=35.5)$

At $100°\mathrm{C}$, the vapour pressure of a solution of $6.5 \mathrm{g}$ of a solute in $100 \mathrm{g}$ water is $732 \mathrm{mm}$. If ${\text{K}}_{\text{b}}\text{=0.52}$, the boiling point of this solution will be _____.

The relation between the solubility of a gas in liquid at constant temperature and external pressure is stated by which law?