The decreasing order of ionic character of the N-H, F-H, C-H, and O-H, is :  

The correct increasing order of ionic character of the following molecule is:
 LiF, K₂O, N₂, SO₂, ClF₃ 

1. N₂ < SO₂ < ClF₃ < K₂O < LiF

2. N₂ > SO₂ > ClF₃ > K₂O < LiF

3. N₂ > SO₂ > K₂O > ClF₃ > LiF

4. LiF > K₂O < ClF₃ > SO₂ > N₂