JEE MAIN - Chemistry (2009 - No. 1)
A binary liquid solution is prepared by mixing n-heptane and ethanol. Which one of the following
statements is correct regarding the behaviour of the solution ?
The solution formed is an ideal solution
The solution is non-ideal, showing +ve deviation from Raoult’s law.
The solution is non-ideal, showing –ve deviation from Raoult’s law.
n-heptane shows +ve deviation while ethanol shows –ve deviation from Raoult’s law.
Explicació
For this solution intermolecular interactions between $$n$$-heptane and ethanol aare weaker than $$n$$-heptane -$$n$$- heptane & ethanol-ethanol interactions hence the solution of $$n$$-heptane and ethanol is non-ideal and shows positive deviation from Raoult's law.