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(B) Boiling point elevation is a colligative property given by $\Delta T_b = i \cdot K_b \cdot m$. Assuming complete dissociation,we compare the produ

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$0.01 	ext{ m } MgCl_2$

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(B) Boiling point elevation is a colligative property given by $\Delta T_b = i \cdot K_b \cdot m$. Assuming complete dissociation,we compare the product $i \cdot m$ for each solution:$(A)$ For $0.1 	ext{ m } AlCl_3$: $i = 4$,$i \cdot m = 4 	imes 0.1 = 0.4$$(B)$ For $0.01 	ext{ m } MgCl_2$: $i = 3$,$i \cdot m = 3 	imes 0.01 = 0.03$$(C)$ For $1 	ext{ m } KCl$: $i = 2$,$i \cdot m = 2 	imes 1 = 2.0$$(D)$ For $0.5 	ext{ m } NaCl$: $i = 2$,$i \cdot m = 2 	imes 0.5 = 1.0$The lowest value of $i \cdot m$ is $0.03$,hence $0.01 	ext{ m } MgCl_2$ has the lowest boiling point elevation.

Which of the following solutions exhibits the lowest value of boiling point elevation assuming complete dissociation?

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