JAMB - Chemistry (1989 - No. 40)
It can be deduced from the vapour pressure curves above that
liqiud 1 has the highest boiling point
liquid ll has the highest boiling point
liquid lll has the highest boiling point
liquid lll has the lowest boiling point
הֶסבֵּר
Trace the iii curve horizontally and you have over 20°C temperature