Question

Mixture of volatile components A and B has a total vapour pressure (in torr)p=`254-119 x_(A)`is where`x_(A)`mole fraction of A in mixture .Hence`P_(A)^@`and `P_(B)^@`are(in torr)
A. `254,119`
B. `119,254`
C. `135,254`
D. `154,119`

Answer 1

Correct Answer - C
`P_("total")=254-119chi_(A)`
For `P_(A)^(@): "put" chi_(A) = 1 rArr P_(A)^(@)=135 mm Hg`
For `P_(B)^(@): "put" chi_(A) = 0 rArr P_(B)^(@)=254 mm Hg`