Non ideal solutions can be minimum boiling or maximum boiling azeotropes.Which one of the following is an example of minimum boiling azeotrope.

H-bonds in ${\mathrm{C}}_2{\mathrm{H}}_5\mathrm{OH}$ are weakened by the addition of ${\mathrm{CH}}_3{\mathrm{COCH}}_3$.

Let A = ${\mathrm{C}}_2{\mathrm{H}}_5\mathrm{OH}$ and B = ${\mathrm{CH}}_3{\mathrm{COCH}}_3$

Magnitude of A-B interactions are weaker than A-A and B-B . It shows positive deviations from Raoult's law.

V. P of the a mixture is higher than expected $\therefore$BP of the mixture is lesser than any of the two components. It is a minimum boiling azeotrope.