\( \Rightarrow \,\,0.23\,\, = \,\,\frac{{1000\,\, \times \,\,1.86\,\, \times \,\,0.85\,\, \times \,\,i}}{{136.3\,\, \times \,\,125}}\)
\(\alpha \, = \,\,\frac{{i\,\, - \,\,1}}{{N\,\, - \,\,1}}\,\, = \,\,\frac{{i\,\, - \,\,1}}{{3\,\, - \,1}}\,\, = \,\,73.5\% \)
($n-$ ઓક્ટેનનું મોલર દળ $114 \,g\, mol ^{-1}$ આપેલ છે)
(બેન્ઝિન માટે $K_f $ $= 5.12 \,K\, kg\, mol^{-1}$)