Two components A and B form an ideal solution. The mole fraction of A and B in ideal solution are XA and XB while that of in vapour phase, these components have their mole fractions as YA and YB .Then, the slope and intercept of plot of 1YA vs 1XAwill be:

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PA°PB°, PB°-PA°PB°

PB°PA°, PA°-PB°PA°

PB°PA°, PB°PB°-PA°

PA°-PB°, PA°PB°

answer is B.

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Detailed Solution

PA=P°AXA (P°A and P°B = V.P of pure A and B) PB=P°BXB YA=PAPA+PB ⇒P°AXAP°AXA+PB°(1-XA) ⇒YA=P°AXAXA(P°A-PB°)+P°B ⇒1YA=P°A-PB°P°A+P°BP°A.1XA So, slope is P°BP°A and intercept =P°A-PB°P°A

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