Of the following 0.10 m aqueous solutions, which one will exhibit the largest freezing point depression?

K C l

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C_{6} H_{12} O_{6}

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A l_{2} (S O_{4})_{3}

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K_{2} S O_{4}

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Solution

The correct option is C $A l_{2} (S O_{4})_{3}$
Of the given 0.10 m aqueous solutions, $A l_{2} (S O_{4})_{3}$ will exhibit the largest freezing point depression.
The expression for the freezing point depression of the solution is
$Δ T_{f} = i K_{f} m$
Van't Hoff factor $i$ is highest for $A l_{2} (S O_{4})_{3}$ which is $5.$ Hence, it will give maximum depression in the freezing point.

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