Which of the following aqueous solutions should have the highest boiling point?
(a) 1.0 M NaOH (b) 1.0 M Na2SO4
(C)1.0 M NH4NO3 (d) 1.0 M KNO3
(b) As we know greater the value of van't Holf fctor higher will be the elevation in boiling point and hence higher will be the boiling point of solution.
Solutionvan′t Hoff factor (i)1.0 MNaOH 21.0 MNa2SO4 31.0 MNH4NO321.0MKNO3 2
Hence, 1.0 MNa2SO4 has highest value of boiling point.