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(A) The elevation in boiling point is given by $\Delta T_{b} = i \cdot K_{b} \cdot m$,where $i$ is the van't Hoff factor and $m$ is the molality (prop

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$ii < i < iii < iv$

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(A) The elevation in boiling point is given by $\Delta T_{b} = i \cdot K_{b} \cdot m$,where $i$ is the van't Hoff factor and $m$ is the molality (proportional to concentration $C$).Since $K_{b}$ is constant for the solvent,$\Delta T_{b} \propto i \cdot C$.Solution$i \cdot C$$(i) \ 10^{-4} \ M \ NaCl$$2 	imes 10^{-4}$$(ii) \ 10^{-4} \ M \ 	ext{Urea}$$1 	imes 10^{-4}$$(iii) \ 10^{-3} \ M \ NaCl$$2 	imes 10^{-3}$$(iv) \ 10^{-2} \ M \ NaCl$$2 	imes 10^{-2}$Comparing the values of $i \cdot C$: $1 	imes 10^{-4} Therefore,the order of increasing boiling points is $(ii) < (i) < (iii) < (iv)$.

Arrange the following solutions in order of their increasing boiling points.
$(i) \ 10^{-4} \ M \ NaCl$ $(ii) \ 10^{-4} \ M \ \text{Urea}$ $(iii) \ 10^{-3} \ M \ NaCl$ $(iv) \ 10^{-2} \ M \ NaCl$

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Arrange the following solutions in order of their increasing boiling points.$(i) \ 10^{-4} \ M \ NaCl$ $(ii) \ 10^{-4} \ M \ \text{Urea}$ $(iii) \ 10^{-3} \ M \ NaCl$ $(iv) \ 10^{-2} \ M \ NaCl$