Question

Which of the following solutions will have the highest boiling point ?

• A. $\text{0} \text{.1} \, \text{M} \, \text{FeCl}_{\text{3}}$
• B. $\text{0} \text{.1} \, \text{M} \, \text{BaCl}_{\text{2}}$
• C. $\text{0} \text{.1} \, \text{M} \, \text{NaCl}$
• D. $\text{0} \text{.1} \, \text{M} \, \text{Urea}$

Answer 1

Answer: (A)

$\text{0} \text{.1} \, \text{M} \, \text{FeCl}_{\text{3}}$ will give the maximum number of particles (i.e.,ions) in the solution. Hence, its elevation in boiling point is maximum and therefore, it has highest boiling point.
$\text{FeCl}_{\text{3}} \rightleftharpoons \text{Fe}^{\text{3+}} \, \text{+} \, \text{3Cl}^{-}$