Vessel-1 contains w_2 ~g of a non-volatile solute X dissolved in...

Vessel-I (\left(\Delta \mathrm{T}_{\mathrm{b}}\right)_{$\mathrm{I}$}=\mathrm{i}_{\mathrm{x}} \frac{\mathrm{w}_2}{\mathrm{M}_{\mathrm{x}}} \cdot \frac{1}{\mathrm{w}_1} \times 1000 \times \mathrm{K}_{\mathrm{b}}) (\mathrm{M}_{\mathrm{X}}=) Molar mass of ' X ' Vessel-II (\left(\Delta \mathrm{T}_{\mathrm{b}}\right)_{$\mathrm{II}$}=\mathrm{i}_{\mathrm{Y}} \frac{\mathrm{w}_2}{\mathrm{M}_{\mathrm{Y}}} \cdot \frac{1}{\mathrm{w}_1} \times 1000 \times \mathrm{K}_{\mathrm{b}}) $M_Y=$ Molar mass of ' $Y$ ' $$\begin{aligned} & \frac{\left(\Delta T_b\right)_{\mathrm{I}}}{\left(\Delta \mathrm{T}_{\mathrm{b}}\right)_{\mathrm{II}}} \times 100=\frac{\mathrm{i}_{\mathrm{x}}}{\mathrm{i}_{\mathrm{Y}}} \cdot \frac{\mathrm{M}_{\mathrm{Y}}}{\mathrm{M}_{\mathrm{x}}} \times 100 \\ & =1.2 \times \frac{100}{80} \times 100 \\ & =150 \% \end{aligned}$$)$