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Q.
Which of the following aqueous solutions has the highest boiling point?
Delhi UMET/DPMTDelhi UMET/DPMT 2009
Solution:
We know that for solutions of different solutes of the same strength, the magnitude colligative property is more for that solute which gives more number of particles.
As, in aqueous solution, $KNO _{3}, Na _{3}, PO _{4}, BaCl _{2}$ and $K _{2} SO _{4}$ will give $2, 4, 3$ and $3$ particles (ions) respectively.
Therefore, $Na _{3} PO _{4}$ solution will show highest boiling point.