Embibe Experts Solutions for Exercise 3: Assignment

Which is having highet elevation in boiling point?

Freezing point of solution is marked as 

Van't Hoff factor for acetic acid in aqueous medium at infinite dilution is

Correct oder of freezing point of given solution 

I. $0.1\mathrm{M}$ glucose

II. $0.2\mathrm{M}$ urea

III.$0.1\mathrm{M} \mathrm{NaCI}$

IV. $0.05\mathrm{M} {\mathrm{CaCI}}_2$

Boiling point of $0.01{\mathrm{MAB}}_2$ which is $10\%$ dissociated in aqueous medium$\left({\mathrm{K}}_{\mathrm{b}}\left({\mathrm{H}}_2\mathrm{O}\right)=0.52\right)$ as ${\mathrm{A}}^{+2}$ and ${\mathrm{B}}^{-}$

 

If any solute $\text{'}\mathrm{A}\text{'}$ dimerises in water at $1 \mathrm{atm}$pressure and the boiling point of this solution is $100.52°\mathrm{C}$. If $2$ moles of $\mathrm{A}$ is added to $1 \mathrm{kg}$ of water and ${\mathrm{k}}_{\mathrm{b}}$ for water is$0.52°\mathrm{C}/\mathrm{molal}$, calculate the percentage association of $\mathrm{A}$

Substance $\mathrm{A}$ tetramerises in water to the extent of $80\%$. A solution of $2.5 \mathrm{g}$ of $\mathrm{A}$ in $100 \mathrm{g}$ of water lowers the freezing point by $0.3°\mathrm{C}$. The molar mass of $\mathrm{A}$ is $\left({\mathrm{K}}_{\mathrm{f}}\right.$ for water $\left.=1.86 \mathrm{K} \mathrm{kg}{ \mathrm{mol}}^{-1}\right)$

${\mathrm{K}}_4\left[\mathrm{Fe}(\mathrm{CN}{)}_6\right]$ is supposed to be $40\%$ dissociated when $1\mathrm{M}$ solution prepared. Its boiling point is equal to another $20\%$ mass by volume of non-electrolytic solution A. Considering molality = molarity. The molecular weight of $\mathrm{A}$ is