c
Given \(: W_{B}=6.5\, \mathrm{g}, \,\,W_{A}=100\, \mathrm{g}\)

\(p_{s}=732\, \mathrm{mm},\,\, K_{b}=0.52\)

\(T_{b}^{o}=100\,^{o} \mathrm{C},\,\, p^{o}=760 \,\mathrm{mm}\)

\(\frac{p^{o}-p_{s}}{p^{o}}=\frac{n_{2}}{n_{1}}\)

\(\Rightarrow \frac{760-732}{760}=\frac{n_{2}}{100 / 18}\)

\(\Rightarrow n_{2}=\frac{28 \times 100}{760 \times 18}=0.2046\, \mathrm{mol}\)

\(\Delta T_{b}=K_{b} \times m\)

\(T_{b}-T_{b}^{o}=K_{b} \times \frac{n_{2} \times 1000}{W_{A}\,(g)}\)

\( T_{b}-100\,^{o} \mathrm{C} =\frac{0.52 \times 0.2046 \times 1000}{100} \)

\(=1.06 \)

\(T_{b}=100+1.06 =101.06\,^{o} \mathrm{C} \)