A) \[\text{0}\text{.01M}\,\text{N}{{\text{a}}_{\text{2}}}S{{O}_{4}}(aq)\]
B) \[\text{0}\text{.01M}\,\text{KN}{{\text{O}}_{\text{3}}}(aq)\]
C) \[0.015\,\text{M}\,\text{urea}\,\text{(aq)}\]
D) \[0.015\,\text{M}\,\text{glucose(aq)}\]
Correct Answer: A
Solution :
Molecules having maximum number of ions will have maximum value of boiling point. In the given options, \[\text{0}\text{.01}\,\text{M}\,\text{N}{{\text{a}}_{\text{2}}}\text{S}{{\text{O}}_{\text{4}}}\]contains maximum number of ions. So,\[\text{ }\!\!~\!\!\text{ 0}\text{.01 M N}{{\text{a}}_{\text{2}}}\text{S}{{\text{O}}_{\text{4}}}\] has highest boiling point.
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