Which of the following statements about the composition of the vapour over an ideal 1:1 molar mixture of benzene and toluene is correct at 25^(@)C (Given vapour pressure data at 25^(@)C, benzene = "12.8 kPa, toluene = 3.85 kPa")

Which of the following statements about the composition of the vapour

1.	Which of the following statements about the composition of the vapour over an ideal 1:1 molar mixture of benzene and toluene is correct at 25^(@)C (Given vapour pressure data at 25^(@)C, benzene = "12.8 kPa, toluene = 3.85 kPa")
Answer» The vapour will contain equal amounts of benzene and toluene Not ENOUGH INFORMATION is given to make a prediction The vapour will contain a higher PERCENTAGE of benzene The vapour will contain a higher percentage of toluene Solution :`P_("Benzene")=x_("Benzene")xxP_("Benzene")^(@)` `P_("Toluene")=x_("Toluene")xxP_("Toluene")^(@)` For an ideal `1:1` mixture of benzene and toluene `x_("Benzene")=(1)/(2),x_("Toluene")=(1)/(2)` `P_("Benzene")=(1)/(2)xxP_("Benzene")^(@)=(1)/(2)xx12.8"k PA = 6.4 k Pa"` `P_("Toluene")=(1)/(2)xxP_("Toluene")^(@)=(1)/(2)xx3.85" k Pa = 1.925 k Pa"` Thus, the vapour will contain higher percentage of benzene as the partial vapour pressure of benzene is higher than that of toluene.