1. \"Rank the following molecules in terms of their increasing acid strength; 1-weakest acid, 4- strongest acid. Give brief explanations for your choices.\" OH OH OH NO2 CH3 Solution Electron withdrawing groups (NO2) increases the acidity while electron donating groups (CH3) decreases the acidity. So, O-Cresol (o-methyl phenol, and weak acid) < cyclohexanol < cyclohexenol < o-nitro phenol (strong acid). And compounds with OH group on sp2 carbon are more acidic than compounds with sp3 due to resonance factors which involves delocalisation on alkoxide..