A solution containing $62 g$ ethyl glycol in $250 g$ water is cooled to $- 10^{o} C$ . If $K_{f}$ for water is $1.86 K k g m o l^{- 1}$ , the amount of water $(i n g)$ separated as ice is:

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Solution

The correct option is D 64
$Δ T_{f} = K_{f} . m$

$10 = 1.86 \times \frac{62 / 62}{W_{k g}}$

$W = 0.186 k g$

$Δ W = (250 - 186) = 64 g m$

Hence, the correct option is $D$

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