Which of the following solutions in $H_{2} O$ will show maximum depression in freezing point?

0.1 M K_{2} [H g I_{4}]

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0.2 m B a {(N O_{3})}_{2}

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0.3 M g l u c o s e

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0.4 M N a C l

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Solution

The correct option is A $0.2 m B a {(N O_{3})}_{2}$
Depression in freezing point $\propto$ Number of moles
Therefore,greater the number of moles greater will be depression in freezing point.
$∴$ For 0.2 M $B a {(N O_{3})}_{2}$ , $i = 3$

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