Two moles of a liquid A(P_(A)^(@) = 100" torr") and 3 moles of liquid (B) ( P_(B)^(@)= 150 "torr")form a solution having vapour pressure os 120 torr. Based upoin this observation which of the following is correct ?

Two moles of a liquid A(P_(A)^(@) = 100" torr") and 3 moles of liquid

1.	Two moles of a liquid A(P_(A)^(@) = 100" torr") and 3 moles of liquid (B) ( P_(B)^(@)= 150 "torr")form a solution having vapour pressure os 120 torr. Based upoin this observation which of the following is correct ?
Answer» <P>Interactions between like molecules `GT` those between unlike molecules Interactions between like molecules `lt` those between unlike molecules Interaction between like molecules = those betweenunlike molecules Nothing can be concluded. Solution :Mole fraction of `A=2/(2+3)=0.40` Mole fraction of `B=3/(2+3)=0.60` Accordiing to RAOULT's Law ` P=P_(A)^(@)x_(A)+P_(B)^(@)X_(B)` `P=(100"torr"xx0.4)+(150"torr"xx0.6)` =(40+90)=130 torr Scine the OBSERVED vapour pressure (120 torr) is samller that the calculated value of value of vapour pressure, this means that interactions `(A-B)gt(A-A)"and"(B-B)` interactions In other words, solution exhibits nagative DEVIATIONS from Raoult's Law.