Question

what is the order of basicity

Answer 1

Overall, the electronegativity order is C (2.5) < N (3.0) < O (3.5) < F (4.0), so the order of basicity is -CH3 (strongest base) > -NH2 > HO- > F-. The relationship between conjugate basicity and acidity is an inverse one, so the order of acidity is: CH4 (weakest acid) < NH3 < H2O < HF (strongest acid).