Depression in Freezing Point

A solution containing $8.0 \mathrm{g}$ of nicotine in $92 \mathrm{g}$ of water freezes $0.925$ degrees below the normal freezing point of water. If the molal freezing point depression constant, ${\mathrm{K}}_{\mathrm{f}}=1.85°\mathrm{C} {\mathrm{mol}}^{-1}$, then the molar mass of nicotine is:

The addition of $0.643 \mathrm{g}$ of a compound to $50 \mathrm{ml}$ of benzene (density $=0.879 \mathrm{g} {\mathrm{mol}}^{-1}$) lowers the freezing point from $5.51°\mathrm{C}$ to $5.03°\mathrm{C}$. If the freezing point constant, ${\mathrm{K}}_{\mathrm{f}}$, for benzene is $5.12 \mathrm{K} \mathrm{kg} {\mathrm{mol}}^{-1}$, the molar mass of the compound is approximately:

The freezing point of pure benzene is $5.5 °\mathrm{C}$. When $2.9 \mathrm{g}$ of butane is dissolved in $200 \mathrm{g}$ of benzene, the freezing point of benzene decreases to $4 °\mathrm{C}$. To lower the freezing point of benzene by another $1.5 °\mathrm{C}$, the amount of butane that has to be added to mixture is:

Determine the freezing point (in ${}^{\circ }\mathrm{C}$) of a solution containing $0.1 \mathrm{g}$ of ${\mathrm{K}}_3\left[\mathrm{Fe}{\left(\mathrm{CN}\right)}_6\right]$ (Mol. Wt. $329$) in $100 \mathrm{g}$ of water $\left({\mathrm{K}}_{\mathrm{f}}=1.86 \mathrm{K} \mathrm{kg} {\mathrm{mol}}^{-1}\right)$.

A complex of iron and cyanide ions is $100\%$ ionised at $1 \mathrm{m}$ (molal). If its elevation in the boiling point is $2.08$. Then, the complex is $\left({\mathrm{K}}_{\mathrm{b}}=0.52 °\mathrm{C} {\mathrm{mol}}^{-1} \mathrm{kg}\right)$:

A $0.2$ molal aqueous solution of a weak acid $\left(\mathrm{HX}\right)$ is $20$ percent ionised. The freezing point of this solution is: (Given ${\mathrm{K}}_{\mathrm{f}}=1.86°\mathrm{C} \mathrm{kg} {\mathrm{mol}}^{-1}$ for water)

Aqueous solution of barium phosphate which is $100\%$ ionised has ${\mathrm{\Delta T}}_{\mathrm{f}}/{\mathrm{K}}_{\mathrm{f}}$ as $0.05$. Hence, the given solution is:

Which of the following has been arranged in the order of decreasing freezing point?