Which of the following has the highest freezi | vedclass

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(D) The depression in freezing point $(\Delta T_f)$ is a colligative property,which depends on the van't Hoff factor $(i)$.$\Delta T_f = i 	imes K_f

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$1 \ M \ 	ext{Urea}$ solution

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(D) The depression in freezing point $(\Delta T_f)$ is a colligative property,which depends on the van't Hoff factor $(i)$.$\Delta T_f = i 	imes K_f 	imes m$.Since the molality $(m)$ is the same for all solutions,the one with the lowest van't Hoff factor $(i)$ will have the smallest depression in freezing point,and thus the highest freezing point.For $1 \ M \ NaCl$,$i = 2$ $(Na^+ + Cl^-)$.For $1 \ M \ KCl$,$i = 2$ $(K^+ + Cl^-)$.For $1 \ M \ CaCl_2$,$i = 3$ $(Ca^{2+} + 2Cl^-)$.For $1 \ M \ 	ext{Urea}$,$i = 1$ (non-electrolyte).Since urea has the lowest $i$ value,it undergoes the least depression in freezing point,resulting in the highest freezing point among the given options.

Which of the following has the highest freezing point?

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