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Q.
Which of the following solution will have the highest boiling point?
NTA AbhyasNTA Abhyas 2020Solutions
Solution:
For glucose, sucrose, $i=1$. For $NaCl$ and $CaCl _{2}$, the values of van't Hoff
factor are 2 and 3 respectively. $\Delta T _{ b }= k _{ b }( im )$
So effective $\Delta T _{ f }$ for glucose, sucrose, $NaCl$ and $CaCl _{2}$ $\propto \frac{1 \times 10}{180}, \frac{1 \times 10}{342}, \frac{2 \times 10}{58.5}$ and $\frac{3 \times 10}{111}$
Thus, elevation in boiling point is maximum in case of $NaCl$ solution and hence, $NaCl$ would have maximum boiling point. (Boiling point of solution = Boiling point of solvent $+\Delta T _{ b }$