Question

Which aqueous solution would process the lowest boiling point?
A. `1%NaCl`solution
B. 1 % urea solution
C. 1% Glucose solution
D. 1 % sucrose solution

Answer 1

Correct Answer - D
Elevation in b.p.is given by
`DeltaT_(b)=ixxK_(b)xx "molarity"`
`orDeltaT_(b)=ixx1000K_(b)xx(w)/(mW)`
`(W)/(W)` is same for all,hence
`DeltaT_(b)xx(1)/(M)`
Since sucorse has the highest molecular weight hence,lowest elevation will be observed in this case so,`1%`sucrose solutionwill have lowest b.p.