1.

Two liquids A and B have vapour pressure in the ratio P_A^@ : P_B^@=1:3at a certain temperature. Assume A and B form an ideal solution and the ratio of mole fractions of A to B in the vapour phase is 4:3.Then the mole fraction of B in the solution at the same temperature is :-

Answer»

`1/5`
`2/3`
`4/5`
`1/4`

SOLUTION :`y_A/y_B=(P_A^@x_A)/(P_B^@x_B)`
`4/3=1/3xx x_A/x_B, x_A + x_B =1`
`x_A=4x_B`
`x_B=1//5`


Discussion

No Comment Found

Related InterviewSolutions