A) \[0.93{}^\circ C\]
B) \[-\text{ }0.93{}^\circ C\]
C) \[1.86{}^\circ C\]
D) \[-\text{ }1.86{}^\circ C\] \[\Rightarrow \]\[\Delta {{T}_{f}}={{k}_{f}}\times m\] \[=1.86\times 0.5=0.93{}^\circ C\] \[\therefore \] \[\Delta {{T}_{f}}=T_{f}^{o}-{{T}_{f}}\] \[\therefore \] \[{{T}_{f}}=T_{f}^{o}-\Delta {{T}_{f}}=0-0.93=-{{0.93}^{o}}C\]
Correct Answer: B
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