1.

The vapour pressure of a solution of the liquids A (p^(@)=80m m Hg and X _(A) =0.4) and (p^(@) =120 mn Hg and X _(B) =0.6) is found to be 100 mm Hg. It shows that the solution exhibits

Answer»

<P>positive deviation from ideal behaviour
negative deviation from ideal behaviour
ideal behaviour
positive deviation for lower CONE. and negative for higher cone.

Solution :`p _("TOTAL") = p_(A)^(@)x x _(A) +p_(B)^(@) x x_(B)`
`=80.0 x0.4 +120.0 x0.6 =10` 4M m Hg
Thte observed ` P _("total")` is 100 mm Hg which is less then 104 mm Hg. HENCE the solutio shows negative dcviation.


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