c
\(\,\,\Delta {\text{Tb  =  Kb }} \times {\text{ m }} \times {\text{ i (i  =  1)}}\)

\(\therefore {\text{ }}\,\Delta {{\text{T}}_{\text{b}}}{\text{  =  }}{{\text{K}}_{\text{b}}} \times {\text{ m}}\,\,\,\,\therefore \,\,\,\Delta {T_b} = 0.513 \times \left( {\frac{{0.1}}{{200}} \times 1000} \right)\)

\(\therefore {\text{  Tb  =  0}}{\text{.2565 }}{{\text{ }}^o }\) સે

ઉત્કલનબિંદુ  \({\text{ =  100  +  }}\Delta {{\text{T}}_{\text{b}}}{\text{ =  100  +  0}}{\text{.2565 =  100}}{\text{.2565}}{{\text{ }}^o }\) સે