A) \[0.1\,M\,KN{{O}_{3}}\]
B) \[0.1\,M\,N{{a}_{3}}P{{O}_{4}}\]
C) \[0.1\,M\,BaC{{l}_{2}}\]
D) \[0.1\,M\,{{K}_{2}}S{{O}_{4}}\]
Correct Answer: B
Solution :
We know that for solutions of different solutes of the same strength, the magnitudelligative property is more for that solute which gives more number of particles. As, in aqueous solution, \[KN{{O}_{3}},N{{a}_{3}},P{{O}_{4}},BaC{{l}_{2}}\] and \[{{K}_{2}}S{{O}_{4}}\] will give 2, 4, 3 and 3 particles (ions) respectively. Therefore, \[N{{a}_{3}}P{{O}_{4}}\] solution will show highest boiling point.
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