Which of the following aqueous solutions will exhibit highest boiling point?

Options

A. 0.015 M glucose
B. `0.01 M KNO_3`
C. 0.015 M urea
D. `0.01 M Na_2 SO_4`

Answer

D

Explanation

`DeltaT_b = I xx K_b xx m`
For `Na_2 SO_4, ixx m= 3 xx 0.01 = 0.03`
For `KNO_3, ixx m= 2 xx 0.01 = 0.02`
For urea, `ixx m= 1 xx 0.015 = 0.015`
For glucose, `i xx m = 1 xx 0.015 = 0.015`
`i xx m " of " Na_2SO_4`, is highest, hence its boiling point will also be highest