Chemistry - GOC Question with Solution | TestHub

The conjugate bases are CH₃CH₂⁻, CH₃O⁻, F⁻ and CH₃CH₂NH⁻ : the charges sit on C, O, F and N, all in the same period, so electronegativity decides. Stability order of the bases : C⁻ $<$ N⁻ $<$ O⁻ $<$ F⁻, so the acidity order is CH₃CH₃ $<$ CH₃CH₂NH₂ $<$ CH₃OH $<$ HF, i.e. 1, 3, 4, 2.