a
\(\Delta {{\text{T}}_{\text{f}}}{{\text{ }}_{{\text{NaCl}}}}{\text{  =  }}{{\text{i}}_{{\text{NaCl}}}}{\text{  -  }}{{\text{K}}_{\text{f}}}{\text{ }} \times {\text{ }}{{\text{m}}_{{\text{NaCl}}}}\)

\(\therefore {K_f} = \frac{{\Delta {T_f}}}{{{i_{NaCl}} \times {m_{naCl}}}} = \)  અચળ

\(\therefore \,\,\,{K_f} = \frac{{\Delta {T_{fNaCl}}}}{{{i_{NaCl}} \times {m_{NaCl}}}} = \,\,\)

\(\Delta T_f\) યુરિયા /  \({\text{i}}\) યુરિયા  \({ \times m}\)  યુરિયા

\(\therefore \,\,\frac{{0.37}}{{2 \times .01}}\, = \)  \({\Delta {\text{T}}}\) યુરિયા /  \({1 \times 0.02}\)

\(\therefore \,\,\,\,\Delta {\text{T}}\) યુરિયા  \( = \,{\text{0}}{\text{.37}}^o\)