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Solve this following

Question:

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 $\mathrm{X}$ is $\mathrm{A}$, then molecular weight of $Y$ is :-

  1. $\mathrm{A}$

  2. $3 \mathrm{~A}$

  3. $4 \mathrm{~A}$

  4. $2 \mathrm{~A}$


Correct Option: , 2

Solution:

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