A) \[269.2\,K\]
B) \[271K\]
C) \[272\ K\]
D) \[260\,K\]
Correct Answer: A
Solution :
\[\Delta {{T}_{f}}={{K}_{f}}\times m\times i\] \[\frac{2}{\Delta {{T}_{f}}}=\frac{{{k}_{1}}\times \frac{5}{342}\times \frac{1000}{95}}{{{k}_{1}}\times \frac{5}{180}\times \frac{95}{1000}}\] \[\Delta {{T}_{f}}=\frac{342\times 2}{180}=3.8\] \[{{T}_{f}}=269.2K\]
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