Chemistry · 2019
JEE Main · 10 January 2019, Shift 1 · Q56
Liquids A and B form an ideal solution in the entire composition range. At 350 K, the vapor pressures of pure A and pure B are 7 × 10^3 Pa and 12 ×…
Liquids A and B form an ideal solution in the entire composition range. At $\displaystyle 350$ K, the vapor pressures of pure A and pure B are $\displaystyle 7 \times 10^3 \mathrm{~Pa}$ and $\displaystyle 12 \times 10^3 \mathrm{~Pa}$, respectively. The composition of the vapor in equilibrium with a solution containing $\displaystyle 40$ mole percent of A at this temperature is :
Official answer
(4)
$\displaystyle x_{\mathrm{A}}=0.28 ; x_{\mathrm{B}}=0.72$
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JEE Main 2019 Chemistry question, with the answer from NTA’s final answer key. Where our answers come from.