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# The elements X and Y form compounds having molecular formula $XY_2$ and $XY_4$. When dissolved in 20 gm of benzene, 1 gm $XY_2$ lowers the freezing point by 2.3$^{\large\circ}$C, whereas 1 gm of $XY_4$ lowers the freezing point by 1.3$^{\large\circ}$C. The molal depression constant for benzene is 5.1. Calculate the atomic masses of X and Y.

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25.60,42.60
Hence (A) is the correct answer.
answered Jun 12, 2014

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