Freezing point of a \( 4 \% \) aqueous solution of \( \mathrm{X} \) is equal to freezing point o...

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Freezing point of a \( 4 \% \) aqueous solution of \( \mathrm{X} \) is equal to freezing point of \( 12 \% \) aqueous solution of Y. If molecular weight of \( X \) is \( A \), then molecular weight of \( Y \) is
(a) \( 2 \mathrm{~A} \)
(b) \( 3 \mathrm{~A} \)
(c) \( \mathrm{A} \)
(d) \( 4 \mathrm{~A} \)
(Since density of solutions are not given therefore assume molality to be equal to molarity and given \( \% \) is \( \% \mathrm{~W} / \mathrm{V} \) )
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