$0.1\,\, = \,\,\frac{{{W_{solute}}\, \times \,\,1000}}{{\frac{{200}}{2}\,\, \times \,\,100}}$
$ \Rightarrow \,\,{W_{solute}}\,\, = \,\,1\,\,gm$
$\left[\right.$ આપેલ છે $\left.: {K}_{{f}}\left({H}_{2} {O}\right)=1.86\, {~K}\, {~kg}\, {~mol}^{-1}\right]$