1.

P_(A)and P_(B) are the vapour pressure of pure liquid components ,Aand B respectively of an ideal binary solution,If x_(A) represents the mole fraction of component A, the total pressure of the solution will be

Answer»

`p_(A)+x_(A)(P_(B)-P_(A))`
`p_(A)+x_(A)(p_(A)-P_(B))`
`p_(B)+x_(A)(p_(B)-p_(A))`
`p_(B)+x_(A))p_(A)-p_(B))`

SOLUTION :According to Raoult's LAW,
`P=P_(A)x_(A)+P_(B)x_(B)`
For BINARY solutions
`x_(A)+x_(B)=1,x_(B)=1-x_(A)`
` P=P_(A)x_(A)+P_(B)(1-x_(A))`
`P=P_(B)+x_(A)(P_(A)-P_(B))`


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