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QJEEM22Ch7e4a: JEE Main 2022 Chemistry - Class 12 JEEM22Ch7e4a Solution: 2 g of a non-volatile non-electrolyte solute is dissolved in…

2 g of a non-volatile non-electrolyte solute is dissolved in 200 g of two different solvents A and B whose ebullioscopic constants are in the ratio of 1 : 8. The elevation in boiling points of A and B are in the ratio xy{x \over y} (x : y). The value of y is ______________. (Nearest integer)

Step-by-Step Verified Solution

ΔTb=kbm\Delta T b=k b m

amp;(ΔTb)A(ΔTb)B=(kb)A(kb)Bamp;=18=xyamp;∴y=8\begin{aligned}&\frac{\left(\Delta T_{b}\right)_{A}}{\left(\Delta T_{b}\right)_{B}}=\frac{\left(k_{b}\right)_{A}}{\left(k_{b}\right)_{B}} \\\\&=\frac{1}{8}=\frac{x}{y} \\\\&\therefore y=8\end{aligned}

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