question_answer 62)

  Which of the. following aqueous solutions should have the highest boiling point? (a) 1.0 M NaOH                     (b) 1.0 M Na2SC4 (c) 1.0 M N4N03                   (d) 1.0 M KN03

Answer:

                  (b) As we know greater the value of van't Hoff factor higher will be the elevation in boiling point and hence higher will be the boiling point of solution.

Solution	van't Hoff factor (i)
I.0M Na2SO4 I.0M NH4NO3 1.0M KNO3	3 2 2

    Hence, 1.0 M Na2St4 has highest value of boiling point.