At 40^(@)C, the vapour pressure in torr ...

At `40^(@)C`, the vapour pressure in torr of methyl and ethyl alcohol solutions is represented by `P = 119 X_(A)+135`, where `X_(A)` is mole fraction of methyl alcohol. The value of `(P_(B)^(@))/(X_(B))` at lim `X_(A) rarr 0)`, and `(P_(A)^(@))/(X_(A))` at lim `X_(B) rarr 0` are:

254 torr

135 torr

119 torr

140 torr

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The correct Answer is:

`P=119 X_(A) +135,` lim `P_(A)/X_(A)=119+135=254`

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