$273.15\,\, - \,\,271\,\, = \,\,{K_f}\, \times \,\,\frac{{5\,\, \times \,\,1000}}{{180\, \times \,\,100}}\,\,\,$

$ \Rightarrow \,\,2.15\,\, = \,\,\frac{{{K_f}\, \times \,\,5\, \times \,\,10}}{{342}}$ ........ $(1)$

${(\Delta {T_f})_{gulcose}}\, = \,\,{K_f}m\,\, = \,\,{K_f}\, \times \,\,\frac{{5\,\, \times \,\,1000}}{{180\,\, \times \,\,100}}$

$ \Rightarrow \,\,\,{(\Delta {T_f})_{glucose}}\,\, = \,\,{K_f}\, \times \,\,\frac{{5\,\, \times \,\,10}}{{180}}$ ......... $(2)$

${\text{(1)}}$ માંથી ${\text{(2)}}$ ને ભાગતા $\,\,\frac{{{\text{2}}{\text{.15}}}}{{{{{\text{(}}\Delta {{\text{T}}_{\text{f}}}{\text{)}}}_{{\text{glucose}}}}}}\,\, = \,\,\frac{{180}}{{342}}$

${(\Delta {T_f})_{glucose}}\,\, = \,\,4.085\,\,K$

${({T_f})_{glucose\,\,solution}}\,\, = \,\,{({T_f})_{water}}\, - \,\,{(\Delta {T_f})_{glucose}}$

$ = \,\,273.15\,\, - \,\,4.085\,\,\, = \,\,269.065\,\, = \,\,269.07\,\,K$