A) Let number of of moles of B vaporized be a. Number of moles of B in vapour and liquid phase will be a and (1 - a) Number of moles of A in vapour and liquid phase will be (1 - a) and a In liquid phase PT = PA°XA+PB°XB ; PAα+PB°(1−α) In Vapour phase
1
PT
=
YA
PA°
+
YB
PB°
;
1
PT
=
(1−a)
PA°
+
a
PB°
B) A solution of HC1 in water forms non-ideal solution with negative deviation. Hence it forms higher boiling azeotrope. Azeotropic mixtures are constant boiling mixtures C) ΔTf = Kf × molaltiy x i, 0.186 = 1.86 x 0.1 x i ; 1 ⇒ It retains its molecular identity. D) Components of ideal solutions can be separated by distillation method since they form zeotropic mixtures