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(D) The depression in freezing point is a colligative property,which depends on the van't Hoff factor $(i)$.For non-electrolytes like Urea and Glucose

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$K_2SO_4$

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(D) The depression in freezing point is a colligative property,which depends on the van't Hoff factor $(i)$.For non-electrolytes like Urea and Glucose,$i = 1$.For $NaCl$,$i = 2$ $(NaCl \rightarrow Na^+ + Cl^-)$.For $K_2SO_4$,$i = 3$ $(K_2SO_4 \rightarrow 2K^+ + SO_4^{2-})$.Since $K_2SO_4$ produces the highest number of ions $(i = 3)$,it will show the highest depression in freezing point.

Which of the following will have the highest depression in freezing point when their concentration is $0.1 \ M$?

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