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NEET UG CHEMISTRY MCQ: SOLUTIONS

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Analyzing +4 | -1
Two components A and B form an ideal solution. The mole fractions of AA and BB in ideal solution are XAX_A and XBX_B, while that of in vapour phase, these components have their mole fractions as YA\mathrm{Y}_{\mathrm{A}} and YB\mathrm{Y}_{\mathrm{B}}. Then, the slope and intercept of plot of 1YA\frac{1}{\mathrm{Y}_{\mathrm{A}}} vs. 1XA\frac{1}{\mathrm{X}_{\mathrm{A}}} will be:
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Correct option: B
PBoPAo,PAo−PBoPAo\frac{\mathrm{P}_{\mathrm{B}}^{\mathrm{o}}}{\mathrm{P}_{\mathrm{A}}^{\mathrm{o}}}, \frac{\mathrm{P}_{\mathrm{A}}^{\mathrm{o}}-\mathrm{P}_{\mathrm{B}}^{\mathrm{o}}}{\mathrm{P}_{\mathrm{A}}^{\mathrm{o}}}
Option B (PBoPAo,PAo−PBoPAo\frac{\mathrm{P}_{\mathrm{B}}^{\mathrm{o}}}{\mathrm{P}_{\mathrm{A}}^{\mathrm{o}}}, \frac{\mathrm{P}_{\mathrm{A}}^{\mathrm{o}}-\mathrm{P}_{\mathrm{B}}^{\mathrm{o}}}{\mathrm{P}_{\mathrm{A}}^{\mathrm{o}}}) is correct because it is derived from Raoult's law and the definition of mole fractions in the vapor phase.

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