question_answer 87)

  Arrange the following bonds in order of increasing ionic character giving reason. \[N-H,F-H,C-H\]and\[O-H\]

Answer:

  Ionic character in a covalent bond is observed when there is sufficient difference in the electro negativity of the two atoms. Ionic character \[\propto \] Electro negativity difference Order of increasing ionic character \[\underset{\underbrace{2.5\,\,\,\,\,\,\,\,\,2.1}_{0.4}}{\mathop{C-H}}\,<\underset{\underbrace{3.0\,\,\,\,\,\,\,\,\,\,\,\,\,\,2.1}_{0.9}}{\mathop{N-H}}\,<\underset{\underbrace{3.5\,\,\,\,\,\,\,\,\,2.1}_{1.4}}{\mathop{O-H}}\,<\underset{\underbrace{4.0\,\,\,\,\,\,\,2.1}_{1.9}}{\mathop{F-H}}\,\]