Ncert Exercises & Solutions

Arrange the following bonds in order of increasing ionic character giving reason.

$N - H, F - H, C - H and O - H$

Greater is the electronegativity difference between the two bonded atoms, greater is the ionic character.

Bond	N-H	F-H	C-H	O-H
Electronegativity difference	(3.0-2.1)=0.9	(4.0-2.1)=1.9	(2.5-2.1)=0.4	(3.5-2.1)=1.4

Therefore, increasing order of ionic character of the given bonds is as follows

$C - H < N - H < O - H < F - H$