(અહીં : $25^o C$ પર બાષ્પ દબાણના મૂલ્યો અનુક્રમે બેન્ઝિન $= 12.8\, kPa,$ ટોલ્યુઇન $= 3.85 \,kPa$)
\(\because \mathrm{YA}=\frac{\mathrm{P}^{\circ} \mathrm{A} \mathrm{X} \mathrm{A}}{\mathrm{P}}, \mathrm{YB}=\frac{\mathrm{P}^{\circ} \mathrm{BXB}}{\mathrm{P}}\)
\(\mathrm{X}_{\mathrm{A}}\) and \(\mathrm{X}_{\mathrm{B}}\) are same so mole fraction in vapour phase is directly proportional to the vapour pressure.
$A.$ $0.500\,M\,C _2 H _5 OH ( aq )$ અને $0.25\, M\, KBr ( aq )$
$B.$ $0.100\,M\,K _4\left[ Fe ( CN )_6\right]$ (aq) અને $0.100\, M$ $FeSO _4\left( NH _4\right)_2 SO _4$ (aq)
$C.$ $0.05 \,M\, K _4\left[ Fe ( CN )_6\right]( aq )$ અને $0.25\, M\, NaCl$ (aq)
$D.$ $0.15\, M\, NaCl ( aq )$ અને $0.1\, M BaCl _2$ (aq)
$E.$ $0.02\, M\, KCl\, MgCl _{2 .} 6 H _2 O ( aq )$ અને $0.05\, M$ $KCl ( aq )$