$\Delta {K_{f(BaC{l_2})}} = {i_{BaC{l_2}}} \times {K_f} \times {m_{BaC{l_2}}}$

$\therefore {K_f} = \frac{{\Delta {T_{f(KCl)}}}}{{{i_{KCl}} \times {m_{KCl}}}} = \frac{{\Delta {T_{f(BaC{l_2})}}}}{{{i_{(BaC{l_2})}} \times {m_{BaC{l_2}}}}}$

$\therefore {K_f} = \frac{2}{{2 \times 0.01}} = \frac{{\Delta {T_{f(BaC{l_2})}}}}{{3 \times 0.01}}$

$\therefore {\text{ }}\Delta {{\text{T}}_{{\text{f(BaC}}{{\text{l}}_{\text{2}}}{\text{)}}}}{\text{  =  3}}{{\text{ }}^ \circ }$ સે 

$\therefore {\text{ BaC}}{{\text{l}}_{\text{2}}}$ નું ઠારબિદુ ${\text{  =  0  -  }}\Delta {{\text{T}}_{\text{f}}}\,\,\,{\text{ =  0  -  3  =   - 3}}{{\text{ }}^ \circ }$ સે