Which of the following aqueous solutions should have the highest boiling point?

Options

A. 1.0 M NaOH
B. 1.0 M `Na_2SO_4`
C. 1.0 M `NH_2NO_3`
D. 1.0 M `KNO_3`

Answer

B

Explanation

`DeltaT_b=iK_bm`
Concentration is same for all the solutions So,
`DeltaT_b prop i`
`I = 2 " for" NaOH, " "i=3" for " Na_2SO_4`
`I=2" for " NH_4NO_3, " "i=2 " for "KNO_3`
So, elevation in boiling point will be maximum in `Na_2SO_4` solution or `Na_2SO_4` solution will have highest boiling point .
Note : In the question there is an error. Please read `NH_2NO_3` as `NH_4NO_3`.