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An ideal solution is prepared from A and...

An ideal solution is prepared from A and B (both are volatile). The composition of the solution is such that the total vapour pressure is harmonic mean of vapour pressures of pure `A(P_(A)^(@))` and pure `B(P_(B)^(@)).[P_(A)^(@) ne P_(B)^(@)]`
If `x_(A), x_(B)` represents mole freaction of A and B in solution respectively and `y_(A) ` and `Y_(B)` represents mole fraction of A and b in vapour phase, then answer the following questions.
The value of `y_(A)` is equal to :

A

`x_(A)`

B

`x_(B)`

C

`1/2`

D

zero

Text Solution

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The correct Answer is:
C
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