Liquid Solution

Solute '\(X\)' dimerises in water to the extent of \(80\%\). 2.5g of '\(X\)' in \(100 \mathrm{~g}\) of water increases the boiling point by \(0.3^{\circ} \mathrm{C}\). The molar mass of 'X' is \([K_b=0.52 \mathrm{~K} \mathrm{~kg} \mathrm{~mol}^{-1}]\)