Question

Pure water boils at `99.725^(@)C` at Shimla. If `K_(b)` for water is `0.51 K mol^(-1) kg` the boiling point of `0.69` molal urea solution will be:
A. (a) `100.35`
B. (b) `100.08`
C. (c ) `99.37`
D. (d) None of these

Answer 1

Correct Answer - B
`DeltaT_(b)=Kxx"molality"=0.51xx0.69=0.352`
`:. b.pt.=99.725+0.352-100.077^(@)C`